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  1. S

    Holley Retrobright radio interference solutions?

    @Turbo4whl , don't have a ground strap on the hood but ohm meter between hood and firewall shows good connectivity- same with radiator support. @bucket , When I talked to the Morimoto guy he said the loop was the only way to get rid of it. Oddly, my prior LEDs had no RFI
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    Brought home my first square body. 1980 Silverado C10. Utah

    to put it another way, rust is just natures way of telling you, its time to learn how to weld :)
  3. S

    Brought home my first square body. 1980 Silverado C10. Utah

    ooh it doesn't even look too rusty :)
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    Holley Retrobright radio interference solutions?

    So I bit the bullet and put the LED headlights in- and they are great! BUT they also totally kill the FM radio. Tried just sticking these ferrite cores (https://www.amazon.com/dp/B08DC9JF5K/) on the leads, but no joy. Called Morrimoto who makes Retrobrights for Holley and they said I need to...
  5. S

    NEW Brothers Dash Bezels - CHEAP

    @Bennyt - great tip on Holley clearance! Just got a couple 4 button window switches for 5.57 each! https://www.holley.com/products/deals/clearance_parts/parts/09-106
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    NEW Brothers Dash Bezels - CHEAP

    Awesome link! - Just ordered 1983 with A/C for $62
  7. S

    Help with grinding/whirring sound!

    A bad rear pinon bearing could have the same behavior
  8. S

    Accel Plug wires too short

    @Ricko1966 thanks much! I'll guess I'll just get the 4049 set
  9. S

    Accel Plug wires too short

    I got ACCEL 4048 Spark Plug Wires I thought fit my 83 K20 Suburban 350 LT9 (wires route underneath the exhaust manifold), but no matter how I route the wires a couple of the wires are super short and too tight to the exhaust so expect they are wrong for my application. Frustrating as it runs...
  10. S

    Finding smog pump 1985 Chevy K20

    I got mine on ebay- see https://www.ebay.com/sch/i.html?_from=R40&_nkw=smog+pump&_sacat=0&rt=nc&Brand=GM&_dcat=33610
  11. S

    Vacuum Spark Control

    This is the 4 port one I have:https://www.stockwiseauto.com/standard-motor-products-dsv11-vacuum-delay-valve and this search show all of the Standard Motor ones so it might be useful to track down exactly the one you need: https://www.stockwiseauto.com/advanced_search_result?keywords=DSV
  12. S

    Vacuum Spark Control

    @Kilian, You found one? Post a link to the pic or listing. Only 4 port one I've seen was not the same (https://www.ebay.com/itm/266395991602#:~:text=New GM 14075612 Spark Control Valve 1985-86 C/K Truck?msockid=2ff10e6c85be68fe046e1b7c84ac69b8)
  13. S

    Headlight mounts

    Yup- the headlight buckets are held by one spring and two adjusters. the plastic bit is this: https://www.clipsandfasteners.com/Headlight-Adjusting-Nut-GM-p/a11718.htm
  14. S

    Vacuum Spark Control

    4 Port Check Valve looks like this:
  15. 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
  16. 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.
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    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
  18. 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).
  19. 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...
  20. 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
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    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...
  22. 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
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    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
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    Front bumper opinion on position

    Looks like it is supposed to look!
  25. 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

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