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  1. Old Guy Bill

    Rear Brakes Locking Up

    There is always some confusion between “Combination” valves and “Proportioning” valves… Get a Wilwood valve similar to this one, make sure of the fitting size. Mount and plumb it into the rear brake line, and adjust it to where the rears don’t lockup. This is very popular in circle track racing.
  2. Old Guy Bill

    New to gmsquarebody

    Welcome, nice truck!
  3. Old Guy Bill

    LED dash light replacements

    I used the 194 replacements offered by LMC. My eyes see a difference in brightness depending on which way they are installed.
  4. Old Guy Bill

    Wobbly power steering pump pulley

    All I can tell you is get the proper tool to remove the pulley…. It’s available fairly cheap.
  5. Old Guy Bill

    Rust coating for fill neck

    Id think you could just replace it for the same cost…
  6. Old Guy Bill

    Anybody buy from OBStrucksparts.org?

    Never dealt with them but I took one look at the .org site pics and I call it SCAM… wouldn’t send my money there. Of course they could be legit, those types of interior pics are all over the net.
  7. Old Guy Bill

    305 tbi heads on a 350 tbi?

    They will work, but will run out of power way before the 350 heads… We used to run them on circle track street stock cars, they were cheap and did seem to have more low end power… but wouldn’t achieve the same top end.
  8. Old Guy Bill

    Cracked TH350 case

    As previously stated, get another TH350 and go from there. Where I live there aren’t any small shops that do welding/fab for walk in type customers, it just isn’t profitable.
  9. Old Guy Bill

    1977 C20 Heavy duty with 11.15 drums?

    My ‘78 K20 has the 11 5/32” drums on a 14 bolt FF. You need to pull a drum to verify…
  10. Old Guy Bill

    Power brake booster recommendations?

    I can’t tell from the pic, but tall valve covers might have an problem fitting with a stock size booster, might have to go with a slightly smaller diameter booster.
  11. Old Guy Bill

    Who sells the best replacement gas tank

    I put Dorman tanks in mine.. they fit.
  12. Old Guy Bill

    whats every body using.. looking for a new stereo head unit

    Amazingly my dash wasn’t butchered, so I went with the middle RetroSound unit. So far so good, Bluetooth works and it’s plenty loud enough for me. It appears stock.
  13. Old Guy Bill

    Drip Rail Sealant

    I don’t know about what was used originally but I used a very thin layer of black RTV when I put mine back on.
  14. Old Guy Bill

    14bolt FF size vs 10bolt

    Are you sure? I believe the 261 is a drivers side drop
  15. Old Guy Bill

    Ignition control module dwell programming

    I had to dig around but knew I still had it…. I’ve got the advance timing light around here also. I didn’t need the dwell function, using the tach works well though when tuning.
  16. Old Guy Bill

    battery junction Block issue ( see photos)

    Keep in mind the original design wiring system had “Fusible Links” in place in case of overload conditions….
  17. Old Guy Bill

    LED conversion

    The LED front sidemarker light fixtures from LMC work, flashing properly when connected properly. https://www.lmctruck.com/lighting/sidemarker/cc-led-sidemarkers
  18. Old Guy Bill

    Bucket buddy seats

    There are a bunch of custom seat pics on the net… they look great. The vast majority of them are scams…
  19. Old Guy Bill

    Az Square

    Welcome, good looking truck, you scored!
  20. Old Guy Bill

    Meet My Second Wife

    Welcome Bill Good looking Blazer
  21. Old Guy Bill

    Newbie here!

    Welcome! Thanks for the pic, love the look/stance of your truck!
  22. Old Guy Bill

    Engine oil lines.

    Lots of info out there on those old big blocks with those fittings. Small plugs (like freeze plugs) or tapping them for threaded fittings was usual way back in the day.
  23. Old Guy Bill

    Engine oil lines.

    I’d just plug them… Read the post I quoted. Do you plan on hauling heavy loads etc…? Plug ‘em.
  24. Old Guy Bill

    Engine oil lines.

    Mark V GM big block Those fittings will come out of the block, there’s a bypass spring involved. https://www.gmsquarebody.com/threads/big-block-mark-v-oil-cooler-lines.25300/
  25. Old Guy Bill

    I am joining the club with a new to me 1977 GMC C15

    Welcome! Thanks for the pic, so many new folks don’t include one. Good looking truck, great start for a project. I had one just like it way back when, it was “Plain Jane” bought it from a church.

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