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  1. pduffyd

    Th350c lock up wiring

    Same wiring as on my old 84 Monte ss I used to have. I pulled out my 350c and stuck a 700r4 and that plugged straight in worked a treat, and got overdrive. I would definitely use a switch so you have control of the converter lock up. Also I would get power from the brake light switch ( if you...
  2. pduffyd

    PCV routing check

    Coal Creek Chris. Have a look at this thread it may help a bit too. "Under Hood Vacuum Diagram and Tuning Stickers"
  3. pduffyd

    2wd SM465 Crossmember

    Yeah, I have the one that's sitting on your tailgate The are two other brackets that bolt on, one each side, as in this photo, more strength to support the chassis, off the top and bottom of the rails. No filing of holes needed, this was the one that came with my truck with a stock sm465...
  4. pduffyd

    Hydroboost

    Actually, I will let this one go. I need to do a bit more research. Thanks anyway, if I had a C10 I would be upgrading to this unit for sure.
  5. pduffyd

    Hydroboost

    Looking into it a bit more. Are your brakes JD5, JD6? This will be going on my C20, so it might work, but mine are JB7 power brakes, with a hydroboost unit it's a JD7, for me.
  6. pduffyd

    Hydroboost

    Do you have the bracket between the boost unit and the cab? Or is this a non bracket install. Oh and the dust boot? I'm interested if you do have these parts as well.
  7. pduffyd

    2wd SM465 Crossmember

    Here is a picture of my cross member on a 76 C20. Its a W mount as you can see. 2 dozen bolts hold it together too!
  8. pduffyd

    Help with Drum Brakes

    I agree with Rusty, for a C20 3/4 ton 14BFF. My backing plate dia' is about 14.25". I have not taken the rear wheel off to measure the outer drum dia' but it is stamped that the inside dia' for service life of the brakes is 13.09" max. I know the shoes to order are for 13 x 2.5" brakes (JB7).
  9. pduffyd

    Help with Drum Brakes

    Always good to have a plan. The most common seems to be 4.10 ratio. All depends what you want as the axle ratio. 3.21, 3.42, 3.73, 4.10, etc. Happy hunting.
  10. pduffyd

    Spindle won’t budge

    Looks good man. My C20 i replaced with stock upper and lower, just gotta find some good spindles
  11. pduffyd

    Spindle won’t budge

    Just a thought thats all, hope it helps your problem. To get the drag link in the right area. I disconnected the pitman arm and made sure that with no load on the drag link ( I supported the end near the pitman arm with my hand) that it would move freely, and would be at the correct position...
  12. pduffyd

    Spindle won’t budge

    Did you replace the idle arm and pitman arm also? If you did they maybe out of alignment a bit causing the ball joints on the idler pitman to binde, as they dont pivot like a tie rod end. I had this problem when I converted to power steering. To solve the tightness in the drag link assembly i...
  13. pduffyd

    SM465 to auto conversion or something else?

    Welcome gtojohnny. I have settled on the same setup you have. 454 with an sm465. I looked into a 4l80e swap but at around 6k to do the changes I just rebuilt my 465, for a few hundred bucks, which included new anti hop out 3rd (2nd) gear, syncros bearings and gaskets. A 700r4 wont last behind a...
  14. pduffyd

    Help with Drum Brakes

    https://www.lmctruck.com/1973-87-chevy-gmc/cc-1973-83-parking-brake-cables-2-wd This is my park brake setup, note item 4, its the gasket between the 2 bolt cable clamp and the drum. Its needed to keep water out of the rear brakes.
  15. pduffyd

    Help with Drum Brakes

    Hi Jaxson. I rebuilt my 14 bolt ff rear on my 76 C20. I will have to measure the dia' of the back plate. But yours look different to mine, I have 13 x 2.5 in brakes.
  16. pduffyd

    Swapping from 14B semi-float to 14B full float

    200 bucks of gas! Hey, with 3 tanks and 71 gals of gas you could add a hand pump and sell some at a profit! ;):Caffeine:
  17. pduffyd

    Swapping from 14B semi-float to 14B full float

    Hi Rusty! Yeah its going. Still a rolling chassis only. At least the drive train is in now. Havent been home much in the last year. So havent done much.
  18. pduffyd

    Swapping from 14B semi-float to 14B full float

    Yep i understand your thinking. I too had dual tanks on a previous square i had in Canada. I was able to go down and back up Vancouver island with out refueling. The reasons for THIS rear tank was, as the truck will be empty most of the time 31 gals of gas is always better over the rear axle...
  19. pduffyd

    Swapping from 14B semi-float to 14B full float

    Heres a 14bff for yea. In the back of my 76 C20 131.5" WB. 8200lb GVW Did the blazer fuel tank mod, 31 gal, That is really for Rusty, lol
  20. pduffyd

    Leaky sm465

    If you are interested in how hard it is to do a rebuild, this guy knows his stuff. I did mine and it came out good for a few hundred bucks.
  21. pduffyd

    Free Parts

    Big Chip this is my zip Sarasota, FL 34249 PM me and we can go from there, thanks
  22. pduffyd

    Free Parts

    I would like the pedal assembly, if possible. Throttle, brake clutch complete.
  23. pduffyd

    Where does this hose hook up to?

    Maybe its connected to the th400 modulator, and was disconnected from the vacuum source on the inlet manifold? I never have played with a later squares nothing after 81, but do the heater controls, control vacuum motors/diaphrams for vent/heater outlets, if yes it may well be the control source...
  24. pduffyd

    83 k10

    Should be plenty of 350s around. I have no idea how many millions were made. Keep searching, one will turn up.
  25. pduffyd

    83 k10

    Chazlee, stay the course mate, just keep looking for another 350. I had a 4.3 in my 2002 Blazer, and it was heavier on gas than my Monte Carlo with a crate 350. Of course the Monte had plenty of power, couldnt say that for my Blazer! Did the junk yard let you keep the parts? If so think of it...

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