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  1. S

    Vacuum Spark Control

    4 Port Check Valve looks like this:
  2. S

    Vacuum Spark Control

    Delay valve looks like DSV 19 https://buyanycarparts.com/products/spark-delay-valve-dsv19-for-chevy-vehicles-p-n-p180443.html
  3. S

    Vacuum Spark Control

    Unless you are trying to restore to stock or pass emission, you can just run the vacuum from carb and it will work.
  4. S

    Vacuum Spark Control

    Hard to say w/o looking up the part numbers in the GM parts book. The check valve is 4 port, I've not been able to locate one on the interwebs. Delay valve might be available
  5. S

    Vacuum Spark Control

    Not exactly one size fits all, but they should be similar enough for any 350's in that year (except California).
  6. S

    Vacuum Spark Control

    All TVS are coolant controlled. I think there are 2 on the 1983 M engine, one 2 port and one 4 port. You are asking about the two port circled only controls the distributor vacuum advance - dashed line goes to the lower port on the TVS and part of check valve nearest carb which is notionally...
  7. S

    What could this random tube attached to the exhaust be?

    Its for the Thermac system- see https://www.gmsquarebody.com/threads/thermac-system.11855/page-2
  8. S

    4 Headlight front end Recommendation

    Following on my May 2024 post regarding the Auxbeam 4x6 LED Headlights (https://www.amazon.com/gp/product/B0896XXLQF/). After a 1300 mile road test, I can definitively say DONT buy these lights They are a waste of money. Even after perfect aiming, Low beam light pattern is terrible to the point...
  9. S

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    I just used zip ties to secure mine to the console- works pretty good to keep them handy
  10. S

    Cab leaking

    Pull the wipers and cowl and check the seam between firewall and dash - they will always leak there. Get it super clean and prime it, paint it, let dry, then seal it up. Flexseal worked great for me
  11. S

    Front bumper opinion on position

    Looks like it is supposed to look!
  12. S

    Clamp on roof rack? I'm feeling rather horny.

    Nice! I would not use the roof rails for anything other than catching drips. They are only held on by 7mm sheet metal screws. You could use rivet nuts and some decent sealer and make it all custom https://en.wikipedia.org/wiki/Rivet_nut
  13. S

    Dash Brake light comes on after a couple minutes of driving

    Definitely check that parking brake- sometimes its that easy.
  14. S

    Ball joints

    I had the same problem. Soaked everything w PB Blaster for 3 days and still no joy with the bfh. I finally used a torch to heat the flange up, and worked around the perimeter with air hammer using a wide autobody bit like these https://www.amazon.com/dp/B0BC2PY46J/ Then a couple smacks with the...
  15. S

    R12 recharge from high side?

    No
  16. S

    Is small front cross member movement normal

    It should not move at all
  17. S

    Waterproofing floor

    Even if you do rubber, Fix the leak first. Bad stuff happens when water gets in the cab.
  18. S

    Cab leaking

    open up the cowl. Get it dry and clean, Cover everything with flex seal. flexsealproducts.com
  19. S

    3/4 ton brake line versions

    https://www.inlinetube.com/
  20. S

    Steering column

    I put a FR30106BK in my 1983 Suburban. It has a D output to the intermediate shaft, the splines are for the steering wheel. If you go with this one there are a few things to consider. See my post...
  21. S

    tilt steering column

    Sounds like nylon pin that joins the upper to lower shaft is broken. If you hold the lower end of the shaft in a vise, see if you can move the upper section where the tilt ball is in and out. If so the pin is sheared.
  22. S

    Headliner what to do

    Best lookin backer I've ever seen!
  23. S

    1987 GMC Suburban

    It's not a bad job to do even with engine in the truck. When I got mine years ago the EFE (exhaust butterfly) had failed closed so it basically cooked the lifter and cam. Swapped out the cam and lifters and been running great ever since. For the cam, I did have to remove radiator and cut the...
  24. S

    Hooker small block manifolds

    These look awesome, too bad they don't have a direct fit option for my truck. Wondering if they can be modified to accept A.I.R for the emissions challenged.
  25. S

    Poping fuses when ac controls are on

    that'll do it!

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