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  1. Keith Seymore

    1981 C-10 8.5 10 bolt Axle ratio id help please

    This this thisity this this. K
  2. Keith Seymore

    What master cylinder and booster do I get?

    So based on a deep dive into the '83 chart I would recommend: M/C part number 18008065, code ZF 28.6mm bore dia; 37.42mm stroke Booster is 18010581, tandem vacuum, code FD (known as a model "240T"). K
  3. Keith Seymore

    What master cylinder and booster do I get?

    Here's what the '83 chart looks like: ;)
  4. Keith Seymore

    What master cylinder and booster do I get?

    The brake systems are based on GVW. You may have heard people talking about JB5 or JB6 or JB8 or whatever; that's the number you are trying to get to. ("JBx" is vacuum; "JDx" is hydroboost.) JB1 is manual; JB3 is the smallest power system and is kinda rare so I'm always surprised when I...
  5. Keith Seymore

    What master cylinder and booster do I get?

    What's the GVW rating on the truck? Does it have the 1" or the 1.25" front rotors? K
  6. Keith Seymore

    Identify which rear drum brakes

    Do you know your GVW? Since it is a big axle I assume it is 8600 lbs. That would make the truck a JD7 and the rears would be 13"x2.5". That's assuming nothing has been changed since it was built (like it's the rear axle it came with). K
  7. Keith Seymore

    how to identify the gear ratio on my truck

    It's really the only way to be sure. After 40 or 50 years there's no telling what's in there, regardless of what's stamped on the tube or in the SPID. K
  8. Keith Seymore

    Headlight options for 84 K10

    This is correct. V22 is included with YE9 (in English: quad headlights come with Silverado). For Scottsdale Z62 you can opt up and add V22 if you want. V22 not available with Custom Deluxe. K
  9. Keith Seymore

    chassis vin numbers

    C7J187704: C = Chevrolet 7 = 1977* J = Janesville Assembly Plant 187704 = sequential portion of VIN K *I suppose it could be '67, but the differences in the frame itself would be obvious. It cannot be '87 because for the 1987 model year the designation was "H".
  10. Keith Seymore

    New member. 87 V20 Stepside

    I'm a little surprised at those numbers. We sold a ton to the Middle East (Saudi, Kuwait, etc). I couldn't find the picture I was looking for but I have a photo that shows long wheel base steppers (red ones) at the port waiting to be shipped, as far as the eye can see. K
  11. Keith Seymore

    New member. 87 V20 Stepside

    C =Chevy If it was a GMC it would be TV20903. K
  12. Keith Seymore

    What did you pay for a square

    $9954 in October of 1986. (plus $525 destination charge. Total distance from Flint Assembly to Davison Michigan: 9 miles).
  13. Keith Seymore

    87 Stock TBI 350 air cleaner lid flip upside down? Does it help? does it hurt? good or bad idea?

    Well said. Much more concise than my version. K
  14. Keith Seymore

    New Member, new to Chevy

    Squarebody = '73 - '87 at it's purest, with a few models (Blazer/Suburban and 1 tons) straggling over into '91. K
  15. Keith Seymore

    Cutting coils

    Basically the ratio is 1:2, due to the placement of the coil spring in the control arm. That is, one INCH off the coil will result in a drop of two inches at the fender opening. K
  16. Keith Seymore

    1985 c10 step side 4speed manual transmission exploded view

    Yes - 3.73 is a nice choice. That is the equivalent of a 3.42 gear without overdrive. K
  17. Keith Seymore

    1985 c10 step side 4speed manual transmission exploded view

    When you say "1st and 2nd are so long" do you mean the gear ratios? Or the amount the lever moves when shifting? It's a pretty long throw when changing gears. A deeper first gear (higher numerical ratio) would be nice, especially to help get rolling when trailering. As far as finding an...
  18. Keith Seymore

    Wind noise is running me stir crazy

    This. By the way - they were noisy when new. That's why you see these extra seals come and go. Somebody high up would complain about wind noise so we would scurry around and design solutions and get them in production. Then, the next time there was a cost cutting program they would be the...
  19. Keith Seymore

    Center hump

    Unfortunately I did not take any pictures of mine of just the bare floor. '87 2wd with MY6.
  20. Keith Seymore

    Center hump

    Column shifted 2wd vehicles got the low hump. So that would be automatics or three on the tree. Floor shifted manuals (MY6 and M20 SM465) whether 2wd or 4wd and all 4wd got the high hump. K
  21. Keith Seymore

    Best gear ratio for 8 inch lift and 40s?

    If the original poster has an SM465 (with the granny gear) then there is a 110% chance that is is non overdrive. The overdrive manual trans was a New Process A833, RPO MY6, which was a MOPAR trans with third gear set 1:1 and fourth gear as overdrive. K
  22. Keith Seymore

    Intro from an old Assembly Plant guy

    Our paths may have crossed. We moved to Davison in 1969; mom still had that same house until earlier this year. My homes during my adult life have been in Davisburg, Ortonville and now Clarkston, and we still do a lot of activities locally (Davison car show, Widetrackers activities out of...
  23. Keith Seymore

    Intro from an old Assembly Plant guy

    Thank you; I had two uncles that drove for Boutell: Uncle Hal and Uncle Joe. Uncle Joe is the guy that loaned Mr Boutell the money to start the business. Uncle Hal is the reason my family moved to Michigan from SE Missouri. K
  24. Keith Seymore

    Sticky thread for lowering C10s?

    Front hangar and rear hangar detail:
  25. Keith Seymore

    Sticky thread for lowering C10s?

    We did about a dozen trucks back in the day (a '69, a couple '75's, '77, a couple '80's, '82, and a couple '87's off the top of my head) with cut coils in the front and relocated the spring hangars on the frame in the rear. Total cost at the time was about $1.98 for grade 8 bolts/nuts/washers...

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