73 87 c10 subwoofer box. A client recently dropped by California Car Sounds and Tint in Campbell to talk about upgrading the audio system in his classic 1971 Chevy C10 pickup truck. Our store exhibits at the Saratoga Classic & Cool Car Show each year, and the client has seen us there several times over the past few years. He had been impressed with the work we had on display, …

Behind the seat speaker box and questions The 1967 - 1972 Chevrolet & GMC Pickups Message Board ... 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) ... As far as air space you should look to manufacturers recommendations or use a subwoofer box calculator. Using the Theil Small measurements you can …

73 87 c10 subwoofer box. Sorting Order. Results Per Page. There are 14 new and used 1973 to 1975 Chevrolet C10s listed for sale near you on ClassicCars.com with prices starting as low as $7,995. Find your dream car today.

View over 110 "1973-1987 Chevrolet C10 for sale" listings now. New listings added daily. Search locally or nationwide. Email alerts available.

Explore our radio speaker components for Chevrolet/GMC Trucks 1973-87, Blazer, Jimmy and Suburban 1973-91. Ideal for revamping and personalizing.

1973-1988 Chevy C/K Series Truck Radio With Bluetooth USA-740. AM/FM Radio w/ Bluetooth, USB, Aux Input. Option to Add Single CD Player. Fits in Original Dash Location. Backed by a 2 Year Warranty. Item #: CAM-CHTKLL-740. $369.00 $332.10 Recommended. As low as $15.33/mo*. In Stock.Feb 17, 2014 · Sub Box behind the seat. 1 Welcome, Guest. Please login or register. ... More importantly I am wanting to use a JL Audio 10w0V3 subwoofer if anyone has that …Re: Anyone got a subwoofer under his benchseat?!? « Reply #6 on: January 30, 2009, 07:30:56 PM ». You might be able to fit a Kicker CVT under there or maybe another one of the new shallow mount subs (jl audio makes a nice one) Logged. 1985 Silverado K20- 355 SBC Vortec heads and a lil' cam...'73 - '87 GM Truck Modifications. Differential & Driveline . driveshaft measurements. Thread starter ... I'm building a 83 C10. Short box fleetside. Its a 2wd. I'm trying to get a driveshaft cause my truck didn't come with one. I have no measurement to go off of. I'm running a 350 sbc with th350.Borgeson Universal now offers an all new modern quick ratio power steering box to replace the Saginaw/Delphi 800 series in 1968-1987 Chevy C10 trucks (2WD). This all new power steering box has a quick 12.7:1 ratio with firm modern steering feel. The Borgeson Street & Performance power steering box will bolt directly to the stock location and ...Each 10 inch subwoofer box also gets a second application of glue around all internal joints after the final assembly. HIGH GRADE MDF: Our subwoofer box enclosures are built with a durable & thick MDF for solid frequency response and accurate music reproduction. ... Enclosure Dimensions Sub cut out:9.125”, mounting depth: 11.5”, Height: …73-87 Rear air suspension kit. It will fit 1/2 ton This kit will lay your truck on the ground with 24" wheels. The notch comes one piece and slips over the frame then welds on.It has the upper shock mounts already welded to the crossbars.After installing the notch cut the frame and the box in the bottoms with the fille.Jun 4, 2016 · if you just want high qaulity staging, what I did will get you there. Don't even try for the cab corner speakers. at best they fire the sound into the seat back. for good staging, use the box i built, look at page 14 and page 11 on the link i put above. staging is excellent. no bass without a sub box or putting high powered speakers in the door.FOR SALE. Custom 73-87 Chevrolet/GMC Truck, Blazer/Jimmy, Suburban firewall fuse box covers. These bolt to your firewall using the two existing holes for your current/factory fuse box. It is a simple 4" x 4" x 2.5" box, CNC cut on 16 ga metal, and fully welded at all four corners.

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12) Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB) • 3/4" Medium Density Fiberboard Construction. • Durable Black Carpeting. • Pre-Lined with Poly-Fil. • Gold Speaker Terminals. Save $12.00 with coupon.Jun 7, 2017 · 73-87 Square Body Setups? By amanley. June 7, 2017 in Subwoofers / Enclosures. Start new topic. amanley. Members. 13. Posted June 7, 2017. Anyone …Home / All / Vintage Air Gen V Sure Fit AC System - 73-87 C10. 941619. Vintage Air Gen V Sure Fit AC System - 73-87 C10. $1,765.00. Qty. Add to Cart. Estimated lead ... Replacement molded glove box (reduced capacity) Flat steel firewall cover; Sure Fit Part Numbers: 945619 1973-80 Chevy Truck Complete Kit ...

Website: https://www.brotherstrucks.com/In this video Dave takes on a step-by step walk through shortening a long Bedside to make it a short Bedside for any ...

Nov 18, 2023 · Part 1 chevy c10 kick panel speakers install C10 chevy kick speakers panel 87 73 install squarebody. ... Chevy Truck Speaker Box. Author Conrad Mraz 18 Nov 2023 .

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12) Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB) • 3/4" Medium Density Fiberboard Construction. • Durable Black Carpeting. • Pre-Lined with Poly-Fil. • Gold Speaker Terminals. Save $12.00 with coupon.Classifieds for 1973 to 1975 Chevrolet C10. Set an alert to be notified of new listings. 14 vehicles matched. Page 1 of 1. 15 results per page. ..... Contact. Phone: 480-285-1600 Email: [email protected] Address: 7400 E Monte Cristo Ave Scottsdale, AZ ...Oct 20, 2023 · TCI Engineering '73-'87 Squarebody C10 4 Link Install Video - YouTube. My bagged squarebody c10 (bagged squarebody) The ultimate suspension solution for '73-'87 chevy c10 square bodies Tci engineering squarebody c10 bolt-on 4-link. 2nd gen fbody 3 link and triangulated 4 link kits.67-72 Cab Corner 6x9 Speaker Brackets. I have been selling these since 2010 and have sold hundreds of sets of brackets so far, and have had ZERO complaints on quality, fitment, sound or customer service! I have spent a lot of time developing and making these, and take a great deal of pride in them and ensuring my customers are 100% satisfied ...This 67-72 Chevy C10 Sub box is made to fit one SUB (the last 3 pics are of the first box that we built and are just to give you a little idea of what a comparable one would look like finished out) FEATURE/ ADVANTAGE/ BENEFITS: 1.TOTALLY FINISHES OFF YOUR INTERIOR! 2. DOES NOT TAKE AWAY LEG ROOM 3. FLUSH MOUNTS WITH ALL METAL AREAS IN THE CAB 4. BOLTS IN TO THE FACTORY GAS TANK MOUNTS 5. HAND ...

Re: Best speaker arrangement. « Reply #1 on: May 13, 2011, 03:02:38 PM ». IMO - Speakers in the aftermarket kick-panels down low to keep from cutting the doors up and 6x9s in the stock 4x10 rear speaker location. Putting the speakers down low on the kick-panel helps to equalize the distance between left and right for your listening position.Plan to install an in-line filter in the return line. Cheap insurance. Disassemble the two rag joint nuts and bolts and separate the rag joint. Remove the pressure and return line clamp on the frame rail. Remove the pressure and return lines from the steering gear. The suggestion to use line/flare wrenches is solid.Re: Anyone got a subwoofer under his benchseat?!? « Reply #6 on: January 30, 2009, 07:30:56 PM ». You might be able to fit a Kicker CVT under there or maybe another one of the new shallow mount subs (jl audio makes a nice one) Logged. 1985 Silverado K20- 355 SBC Vortec heads and a lil' cam...73-87 c10 Roll pan Rollpan bumper w/ box. by StreetNshow. Write a review. How customer reviews and ratings work See All Buying Options. Top positive review. Positive reviews › mybass. 5.0 out of 5 stars fits good. Reviewed in the United States on April 2, 2020. came in bent but I thank that was in shipping ...Dec 6, 2011 · Three way speakers in the rear tend to make the sound more like it is coming from the back of the truck. Some people like this some don't. 6 by 9's in the rear can work as mid bass or some sub bass if don't add a larger sub. If using amp/s make sure you have the correct power to match the speakers you buy.Sep 10, 2012 · Author Topic: 83 scottsdale subwoofer box (Read 8639 times) 83scottsdale. Newbie; Posts: 3; Newbie; ... 73-87chevytrucks.com » 73-87 Chevy _ GMC Trucks »Update: Some offers mentioned below are no longer available. View the current offers here. For more TPG news and deals delivered each morning to your inbox, ... Update: Some offers...This 67-72 Chevy C10 Sub box is made to fit one SUB (the last 3 pics are of the first box that we built and are just to give you a little idea of what a comparable one would look like finished out) FEATURE/ ADVANTAGE/ BENEFITS: 1.TOTALLY FINISHES OFF YOUR INTERIOR! 2. DOES NOT TAKE AWAY LEG ROOM 3. FLUSH MOUNTS WITH ALL …JL Audio Stealthbox® SB-GM-SLVCC4/12TW3. Custom fit subwoofer enclosure for select 2019-2024 vehicles from Chevrolet, GMC. •12" 4 ohms Loaded Vehicle Specific Stealthbox Subwoofer Enclosure with 2 12TW3 Subwoofer. • 800W RMS • For 2019-Up Chevrolet Silverado / GMC Sierra 1500 Crew Ca. • Replaces the lower cushion and storage unit.Product Details. Highliner uses four built-in, uniquely placed speakers which guarantee true stereo separation as well as less distortion and ensures clarity at lower volume levels by neutralizing the echo effect found in most pickups. Radio console is designed to accept optional aftermarket stereo cassette players, CD players or CB radios.free Downloads. 10000+ "subwoofer box" printable 3D Models. Every Day new 3D Models from all over the World. Click to find the best Results for subwoofer box Models for your 3D Printer.1979 Chevy Dually Crew 4X4 454, D60 Tru-trac, D70 Detroit Locker, 3.73, 4L80E/NP205 1971 GMC 3/4 Ton 4X4 11-03-2013, 11:11 PM ... What subwoofer box are you using?Part 1 chevy c10 kick panel speakers install C10 chevy kick speakers panel 87 73 install squarebody. ... Chevy Truck Speaker Box. Author Conrad Mraz 18 Nov 2023 .Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB) • 3/4" Medium Density Fiberboard Construction. • Durable Black Carpeting. • Pre-Lined with Poly-Fil. • Gold Speaker Terminals. Save $12.00 with coupon. Free shipping in USA. Provide zip for delivery date.Inside Box Panel Fuel Filler – 67-87 GMC Chevy Truck $ 79.99 Add to cart; Universal Truck Bed Wheel Tubs. Rated 5.00 out of 5 ... Stone Guards – 73-87 GMC Chevy Squarebody C10 Truck. Rated 4.67 out of 5 $ 79.99 Add to cart; Aluminum Dash Insert – 73-80 GMC Chevy Squarebody C10 Truck. Rated 5.00 out of 5cyclops. $925.00. In stock. Quantity: 1. Add to Bag. Product Details. This 73-87 Chevy C10 Sub box is made to fit one SUB. (the last 3 pics are of the first box that we built and are just to give you a little idea of what a comparable one would look like finished out)The 73-80 Chevrolet C10 pickups used a 1.28 rotor. Then in 81-86 GM switched to a 1" rotor. I did a bit more digging and found that the calipers are different for the 1" rotor but use a common bolt pattern with 73-80 so, it looks as if the 91 Camaro rotor will work on the 73-86 spindles if the 81-86 calipers are used as well. ... The 73-87 2-1/ ...Product Details. This 73-87 Chevy C10 Sub box, is made to give you a sub enclosure without robbing you of leg room! if we supply the amp it will be mounted in the center section and the face plate will be finished to let the …Order 1973 - 1987 classic Chevy/GMC truck audio parts. We have antennas, speakers, knobs, dash panels and more. Visit our site today!

Most of our kickpanels feature 6 1/2” coaxial (2-way) speakers. We also offer optional Pioneer or Kenwood Speaker upgrades. We build our Kickpanels with black ABS plastic and most of them are available with or without speakers. *Chevelle models sold with speakers only. The best custom Kick Panel Speakers - 73-79 GMC Chevy Squarebody C10 Truck ...This Choppin' Block chassis has changed the way you lay out or coilover your 73-87 C10. Utilizes improved geometry, engineered to lay frame with less hassle. By utilizing the rack and pinion steering, you get smoother steering to give you a more late model truck driving experience. Lays up to a 30” tire front, 31” rear.A client recently dropped by California Car Sounds and Tint in Campbell to talk about upgrading the audio system in his classic 1971 Chevy C10 pickup truck. Our store exhibits at the Saratoga Classic & Cool Car Show each year, and the client has seen us there several times over the past few years. He had been impressed with the work we had on display, …In this video, we cover the and install the components necessary to adapt factory style steering to your LS swap squarebody C10 using a CPP 500 quick ratio s...Jan 16, 2024 · Behind the seat subwoofer box pics The 1947 Present Chevrolet GMC Truck Message Board Network 1973-87 C10 Slammed Roadster Shop Kick Panels for 1973-85 Chevrolet Truck – Retro ManufacturingAmerican Sound Connection Single 12" Subwoofer Regular Standard Cab Truck Sub Box Enclosure 5/8" MDF. dummy. Atrend Universal MDF Constructed Spacer for 10 Inch Speaker or Sub - Adds 3/4" To Depth - Premium Subwoofer Spacer Improves Audio Quality, Sound & Bass - Multiple Usage - Charcoal. dummy. CT Sounds Hydro 12” Dual …Jun 4, 2016 · if you just want high qaulity staging, what I did will get you there. Don't even try for the cab corner speakers. at best they fire the sound into the seat back. for good staging, use the box i built, look at page 14 and page 11 on the link i put above. staging is excellent. no bass without a sub box or putting high powered speakers in the door.

Find All Custom-fit Subwoofer Boxes online that fit your 1980 Chevrolet C10 Pickup. Use our guided shopping tools to get a guaranteed fit. ... Custom-fit subwoofer boxes offer several advantages over generic, universal boxes: Precise Fit: Custom-fit boxes are precisely designed to match your vehicle's dimensions, ...Apr 5, 2018 · Slam Specialties direct bolt-in airbag mounting system for the popular 73-87 squarebody C10 trucks includes bolt-in upper and lower airbag brackets, a set of SSF6-7 airbags and mounting hardware. Slam Specialties airbags are rated at 200 PSI, feature an integrated DOT approved 3/8” push to connect air-line fitting, internal bump stops, and a …Metra Kit 87-99-3052 Dash Kit. Install a new Single-DIN car stereo in select 1973-1991 vehicles from Chevrolet, GMC. • Single-DIN or Dash Kit. • Includes installation instructions. Free shipping in USA. Provide zip for delivery date. This product fits your 1979 C10 Pickup. $19.99. In stock.Rough Country Front Sway Bar Drop Brackets for 67-87 Chevy/GMC C10/K10-1019,Black. ... ‎Rough Country Steering Box Frame Support Kit for 73-87 Chevy GMC | C/K Pickup | Suburban | K5 Blazer | Jimmy - 5040 : Item Weight ‎3.85 pounds : Product Dimensions ‎17.75 x 6.25 x 3.25 inches :73-87.com. 73-87 Cab Corner 6x9 Speaker Brackets. 73-87 Cab Corner 6x9 Speaker Brackets. ... Subwoofer Box. Subwoofer Amplifier. Car Audio Sound System. Subwoofer. Truck Subwoofer Box. ... When I started looking for locations to mount the Holley Dominator ECU and Kicker subwoofers in the cab of my 1968 Chevy C10, ...Or if you do not have a foot of height you could try and make it longer and shorter to fit under seat (again depends on the profile of your sub). if you made the inner dimensions say 9Hx12Wx12L=1296 that is exactly 0.75 cu. ft. Also take into account that the subs cone will move (vibrate) some with the hits (depending how loud you have it.I designed, fabricated and sell cab corner 6x9 speaker brackets for all 73-87 GM trucks, and 88-91 crew/bonus cabs. These brackets are made of heavy duty 16 gauge steel, and fit perfectly in the cab corners...even with the bench seat all the way back. 3 sheet metal screws hold these firmly in place (1 at the top, 2 at the bottom), and they are ...'73 - '87 GM Truck Modifications. Differential & Driveline . driveshaft measurements. Thread starter ... I'm building a 83 C10. Short box fleetside. Its a 2wd. I'm trying to get a driveshaft cause my truck didn't come with one. I have no measurement to go off of. I'm running a 350 sbc with th350.Apr 5, 2018 · Slam Specialties direct bolt-in airbag mounting system for the popular 73-87 squarebody C10 trucks includes bolt-in upper and lower airbag brackets, a set of SSF6-7 airbags and mounting hardware. Slam Specialties airbags are rated at 200 PSI, feature an integrated DOT approved 3/8” push to connect air-line fitting, internal bump stops, and a …Re: 87 pickup speakers. « Reply #1 on: November 21, 2013, 05:28:40 PM ». OE stereos employed two 4x10s in the cab corners behind the seat and two 3.5s in the top of the dash in front of the driver and passenger. OE monophonics employed a single 6x9 4x10 in the top center of the dash. As for recommendations, it depends on how you like your ...subwoofer enclosures - 6x9 boxes - 6.5 speaker boxes - fiberglassing rings - spacers - closeExtra Info. Click to enlarge. Fits: 1973-1987 GM Full-Size Regular Cab Trucks. MDF Construction. Approx. Empty Weight: 38 lbs. Installs behind the seats. Tool shelves must be removed. Amp shelf size: 18"w x 13"h. Fits 10" & 12" shallow subs, no square subs.【Fitment】Behind Seat Speaker Brackets fit for Chevy C10 1973-1987. 【Design】Our behind seat Speaker brackets fit perfectly in your cab corner. Fit 6x9 speakers. 【Material】Made of 16 gauge steel and shipped powder coated matte black. 【Installation】Don't cut your c10 to mount speakers.The revelation was buried deep in a lengthy news release from Facebook about restricting the access to data for third-party apps. Up to 87 million Facebook users’ personal data may...Oct 12, 2012 · Or if you do not have a foot of height you could try and make it longer and shorter to fit under seat (again depends on the profile of your sub). if you made the inner dimensions say 9Hx12Wx12L=1296 that is exactly 0.75 cu. ft. Also take into account that the subs cone will move (vibrate) some with the hits (depending how loud you have it.Find your perfect 1973 Chevrolet C/K 10 Series as low as $18,773 on Carsforsale.com®. Shop millions of cars from over 22,500 respected auto dealers and find the perfect vehicle!Product Details. This 73-87 Chevy C10 Sub box, is made to give you a sub enclosure without robbing you of leg room! if we supply the amp it will be mounted in the center section and the face plate will be finished to let the …

Re: 6x9 speakers in doors. 6x9s can sound good in doors because they have the cone area equal to an 8" woofer and the doors offer the most volume of air in the cab for a speaker to play in. Sealing up the holes in the doors with aluminum sheet siliconed to the door metal to make it more air tight is even better.

Home / All / Vintage Air Gen V Sure Fit AC System - 73-87 C10. 941619. Vintage Air Gen V Sure Fit AC System - 73-87 C10. $1,765.00. Qty. Add to Cart. Estimated lead ... Replacement molded glove box (reduced capacity) Flat steel firewall cover; Sure Fit Part Numbers: 945619 1973-80 Chevy Truck Complete Kit ...

Re: Best speaker arrangement. « Reply #1 on: May 13, 2011, 03:02:38 PM ». IMO - Speakers in the aftermarket kick-panels down low to keep from cutting the doors up and 6x9s in the stock 4x10 rear speaker location. Putting the speakers down low on the kick-panel helps to equalize the distance between left and right for your listening position.Hello my friends is your subwoofer box causing problems behind the seat ? In this video i can show you what is the size of my box before and what is i make i...Plan to install an in-line filter in the return line. Cheap insurance. Disassemble the two rag joint nuts and bolts and separate the rag joint. Remove the pressure and return line clamp on the frame rail. Remove the pressure and return lines from the steering gear. The suggestion to use line/flare wrenches is solid.Find All Custom-fit Subwoofer Boxes online that fit your 1980 Chevrolet C10 Pickup. Use our guided shopping tools to get a guaranteed fit. ... Custom-fit subwoofer boxes offer several advantages over generic, universal boxes: Precise Fit: Custom-fit boxes are precisely designed to match your vehicle's dimensions, ...Here are some of the best light box signs for your business to bring attention to the products and services you provide to your customers. If you buy something through our links, w...1973-1987 Chevy C10 / C20-C30 Crew Cab Introduced. Crew Cab "Dually." Not a C10 but well worth mentioning, 1973 was the first year for a C20 or C30 crew cab built in-house by Chevrolet rather than ...Aug 29, 2022 - Explore Martin Velasco's board "73-87 Chevrolet C10" on Pinterest. See more ideas about chevy trucks, c10 chevy truck, chevy.cyclops. $925.00. In stock. Quantity: 1. Add to Bag. Product Details. This 73-87 Chevy C10 Sub box is made to fit one SUB. (the last 3 pics are of the first box that we built and are …Behind Seat Speaker Brackets (6″ x 9″) Don’t cut your c10 to mount speakers. Our behind seat brackets fit perfectly in your cab corner. Made from 16 gauge steel and shipped raw. Fit 6×9 speakers. These can be screwed, bolted, or even double sided taped in for a no hole install. Sold In Pairs. 7387-SB-Sb69 Installation Instructions.

store manager victoriadanlwd fylmhay sks24 hour pawn shops in las vegas nevadatop 25 men 73 87 c10 subwoofer box fylm swpr madr psr [email protected] & Mobile Support 1-888-750-2912 Domestic Sales 1-800-221-5315 International Sales 1-800-241-7714 Packages 1-800-800-2429 Representatives 1-800-323-8982 Assistance 1-404-209-3998. Steering box, rack and pinion kits for 73-87 trucks. Menu. 0. Street; Off-Road; Apparel . Shirts / Sweatshirts; Hats; Stickers / Extras; Tech Info . 88-98 GM Truck LS Swap; ... Red Head Steering Box - 80-87 C10 / 80-91 SUV $296.00. Red Head Steering Box - 70-76 K10 / SUV. Quick View Red Head Steering Box - 70-76 K10 .... skys fy almdrsh Part 1 chevy c10 kick panel speakers install88-98 chevy/gmc truck speaker box for 2-10 $50 firm Pin on car audioSilverado cab subwoofer. 73-87 cab corner 6x9 speaker brackets chevy pickup trucks, chevy c10, chevy pickups, dodgePin on ☆67-72 trucks☆ dβ 11 silverado ideasChevy silverado truck custom car stereo with custom subwoofer enclosure.New Product1973-87 Slosh Subz. SLOSH SUBZ!! I have teamed up with my shop parter @all_in_cue_woodworx to launch a series of custom fit sub boxes starting with the 73-87 Squarebody trucks, we will be building 3 versions of these boxes. The CYCLOPS with 1 JL 10, the EIGHT SQUARED with 2 Kicker 8’s, and the last one THE DD with 2 round 10’s. sharks fish and tonypercent27s steak menustate one Fits four 8 inch, three 10 inch, or two 12 inch subwoofers ; Air space for dual sub box =.75 cu ft per sub; Air space for single sub box =.5 cu ft per sub ; Mounting Depth= 5.5 inches; 5/8 inch MDF; Charcoal Grey Carpet; Speaker Box Terminals included; choose with or without amplifier rack; subwoofers and amp are not included. tqqflkug4vtsks dwjsh New Customers Can Take an Extra 30% off. There are a wide variety of options. Dec 2, 2008 · Re: sub box idea behind the bench seat. « Reply #7 on: December 03, 2008, 11:00:03 PM ». i have 2 10 inch subs behind my stock seat. the seat is almost all the way up but they sound really good. i also have to tweeters on the dash and custom 61/2 inch speakers in the doors. i really like it. Logged.For the subwoofer in this 1973-1987 Chevy Truck Kicker CS series complete stereo kit we offer 2 different enclsoure options. The Kicker Comp C is a standard 10" woofer that is wired to a 2 ohm load to maximize the power output from the amp. The Kicker Comp C comes in a truck style enclosure in order to save space in your trunk.I drove a 77 C10 with this same type of steering. Very easy to steer and takes alot of movement of the steering wheel to turn the wheels just a little bit. I just did some searching and it appears that about 68 to 76 used the same gear box, and that 77-79 used another, and 80-87 used yet another.