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  1. Craig 85

    What is this hanging off my HEI?

    My '80 C20 3+3 454 non A/C, no cruise did not have that, but my "85 K30 454, A/C, cruise does. It mounts at the rear of the driver side valve cover. It triggers the vacuum pod on the front of the carb between 1600-1900 RPM to prevent back fires when decelerating. It's a different set up than...
  2. Craig 85

    1988 IROC-Z

    Back when I had my 2010 CTS-V it didn't come with a spare, just an air pump and a bottle of flat fix. I had to buy one of these spare kits for a standard CTS then get a 1.5" spacer so it could work on the front if I had a flat.
  3. Craig 85

    Who's truck is this????

    I'll give my option on the lift. It's at least a 4" lift if it's a K20. The gray truck is my old '79 with a 4" lift and 33x12.50x16.5" tires (32.8"). This white truck looks taller than that. The wheels on that truck are probably American Racing Outlaw IIs. The ones on my '79 are American...
  4. Craig 85

    Fuel Pump Selection

    FYI if you get a factory 3 port fuel pump for the 454 it is different between the 2WD version and the 4wd version. I ran into this problem about 5 years ago. I'm not sure if the companies have fixed the issue. Carter/Napa was advertising the 2WD pump fit the 4wd. Here's the difference: The...
  5. Craig 85

    Rear bumper bracket solutions?

    I know for sure the van rear axles are wider by about 4", which makes me believe the van bumper is wider than the truck bumper.
  6. Craig 85

    87 R1500 Quad Headlight Question

    To add to this, I had an 80 C20 3+3 in the early nineties I did a front clip swap to an ‘85 and have had two other ‘85s including my current one. All 3 lit 4 bulbs when the high beams were on.
  7. Craig 85

    K20 Wheel/Tire Confirmation

    5.25” of back space is probably too much for what you’re looking for. These aren’t the best pictures of his truck but Frankenchevy has 16x8” wheels with 4.5” of BS. Tires are 285s. They don’t rub, but his truck is a K30 like mine. They are about 2” taller from the factory than a K20. But you...
  8. Craig 85

    87 R1500 Quad Headlight Question

    As you describe in your first post, although those are mounted horizontally. Either the low beam is on or the high beam, but not 4 at a time.
  9. Craig 85

    87 R1500 Quad Headlight Question

    I haven’t seen that book since I sold my K20 in 1991 to buy my first house. FYI the 89-91 Square Bodies and GMT400s do work that way.
  10. Craig 85

    Steering Correction

    K20 I'd go with a steering arm, it will level out the drag link better than the pitman arm. I've done 3 truck that way. I never needed to add to the drive shafts on a 4" lift. I would rather lengthen a drive shaft than run a spacer. The spacer would make the U-joints bind sooner, especially...
  11. Craig 85

    87 R1500 Quad Headlight Question

    I had an '87 K20, '87 K30 and an '88 C20 Suburban all when they were under 10 years old and totally stock. All of them only the uppers will light with the low beam. All 4 come on with the high beam. That book is wrong for an '87.
  12. Craig 85

    K20 Wheel/Tire Confirmation

    Now you just have to find some of these hub caps...
  13. Craig 85

    2 or 4 inch lift kit

    Here' my old '79 K15. I 3/4 ton axle swapped it and ran Tuff Country EZ Ride 4" front springs. I also used the Off Road Design Sway Bar Disconnect kit to prevent any bind in the front suspension. I ran a 4" block in the rear. Tires were 33x12.50x16.5's (32.8"). I did not have to do anything...
  14. Craig 85

    '85 c10 front end lift?

    Years ago I added Air Lift Air Bags to the front of my C20 as I wanted to run 33x12.50 tires. It gave me about 2" of lift. This is the kit for your truck: Air Lift 1000, Part No. 81560 https://www.airliftcompany.com/shop/81560/ Another option is look at the lift spindles for a "B" body GM...
  15. Craig 85

    K20 Wheel/Tire Confirmation

    I found these pictures on another forum. The link is below the pictures. Supposedly it has 9.75x16.5” wheels with 12-16.5 tires. You can tell from the pictures the front leaves still have somewhat of a negative arc. So it’s either a 2 or 3 leaf front pack. I’d guess 3. I can’t tell if the...
  16. Craig 85

    350 TBI in California

    @Galane My '85 K30 had to get smogged every two years when I lived in CA. It has a regular bed on it. The only difference on my truck was it originally ran on regular gas, so it has factory dual exhaust and no cats. It had just about every other emission item on it though. Thank God I live...
  17. Craig 85

    350 TBI in California

    FYI California has these mobile emissions testing rigs floating around the state. CHP is with them. I retired in 2016 from a PD in Northern California and twice they showed up in town before I left. At the time they were voluntary but in California that can change at anytime. Just be aware...
  18. Craig 85

    Rim fitment for 1978 K20

    Around 1981 the 20 and 30 series trucks went to 16 wheels from the 16.5". I would bet the rim centers are the same. My K30 has 16x10 wheels with 4.5" of back spacing. There are no clearance issues to the inside. I also have larger brakes than a K20. If I remember back to the early 90's when...
  19. Craig 85

    350 TBI in California

    I lived in California my whole life until 2 years ago. I remember when smog tests started in 1984. The rules up until two years ago was you can add newer engine/parts, but could never go back. You still had to use the equipment your vehicle originally came with or fully update to the new...
  20. Craig 85

    K20 Wheel/Tire Confirmation

    Firestone still makes a 9.50-16.5" tire. About $199 each on amazon, but it basically a highway tread. I attached a link. My K30 had 265/75R 16's on when I got it with no rubbing issues. The GM PY0 wheels are 16x6.5". The have a little more back spacing that the 16" steel wheels these trucks...
  21. Craig 85

    Clearance Light Location

    I have these photos. Don't know if you can blow it up large enough to see the numbers clearly. FYI the OEM outer lights are supposed to be at about a 45 degree angle.
  22. Craig 85

    Upper door weatherstrip question.

    I posted that. I've only ever seen them on 79-80 trucks. Back in the early 90's a friend had a construction company that exclusively ran Square Body trucks, about 20 or so. They only ones I've even seen them on were these two years. I added them to a '77 K5 around 91 or 92. I found a set...
  23. Craig 85

    Taillight lens

    I used to use Brasso on our old patrol car light bars lenses, then follow up with Meguires #7.
  24. Craig 85

    ac control vacume line source

    I think this is the vacuum line diagram for your truck.
  25. Craig 85

    headlamp warning chime device & location '84

    Here's an old thread. Has a picture and part number. https://www.gmsquarebody.com/threads/ignition-buzzer.13435/

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