71 GS refreshing

Discussion in 'The Bench' started by BennyK81, May 12, 2019.

  1. BennyK81

    BennyK81 Well-Known Member

    With temperatures rising I found myself comfortable starting to wrench on my car.
    With two helping hands of a good friend this is what we achieved today...

    I am still unsure whether to love or hate it...

    more pictures will follow...


    BYoung likes this.
  2. scubasteve455

    scubasteve455 Well-Known Member

    looks like your hands are full. Man dont wanna go back to those days.
  3. Dr. Roger

    Dr. Roger Stock enthusiast

    It's a love/hate relationship. Told my wife about once every couple of weeks when restoring the GS that "I hate that car." I was able to restrain myself and never threw a wrench through the windshield (although I did do it once right after I accidentally cracked an original perfect windshield). Spent most of my time enjoying it though.
  4. sriley531

    sriley531 Big green hunk of $#*^....

    Yep, there are still times I want lightning to strike and burn the green car to the ground. It's unbelievable how many times that cars has gone from creating pure excitement to soul crushing. Hence why it's still sitting in the barn on the lift halfway through May...

    So you are not alone.
  5. BennyK81

    BennyK81 Well-Known Member

    I need to repair the core support...battery acid did its work:
    IMG_20190513_203740.jpg IMG_20190513_203744.jpg

    Inner fender needs repair as well

  6. BennyK81

    BennyK81 Well-Known Member

    But fenders and body underneath are really rust free wich was a pleasant surprise:
    IMG_20190513_203835.jpg IMG_20190513_204252.jpg IMG_20190513_204454.jpg
    docgsx and scubasteve455 like this.
  7. BennyK81

    BennyK81 Well-Known Member

    Later on I checked the cylinder head numbers:

    and right:

  8. BennyK81

    BennyK81 Well-Known Member

    Well seems that I have a 70 head on the right and a 72 on the left from what I found on the forum....
    starting to hate it more than loving it...

    those heads differ in combustion chamber size right?

    I have a stuck 73 engine in the basement. Are those heads of any use?
  9. yachtsmanbill

    yachtsmanbill Well-Known Member

    The 73 heads are gonna be a closer match to the 72's with A.I.R. porting, but the intake passages are different from the 1970. Hmmm. I think the 72's did not have an EGR valve and the 73's did. That period was the advent pollution controls, and GM was grabbing at straws.

    The core support at least has enough shape left to duplicate as a pattern. The inner fender has a repair piece available. Dont forget to scrape all the seam filler off the cowl and re-do that too. ws





    DEADMANSCURVE my first word : truck

    someone will have a more exact answer but :
    70-72 heads probably pretty close or identical .
    73 heads may be EGR versions and dif . check the intake gasket area too on those .
    if you do a quick measurement/visual check on combustion chambers , port sizes , valve sizes and seems the same probably good to go .
    edit : still can't type fast enough .
    Last edited: May 14, 2019
  11. Stage 2 iron

    Stage 2 iron Nice Chevelle LOL

    70-71 good heads no EGR, 72-74 ok heads has a EGR , 75 -76 heads Junk ……………………………...
  12. BennyK81

    BennyK81 Well-Known Member

    Thanks for the reply. Yes my 73 Engine in the cellar has an EGR intake (the EGR valve is still present. I wont use them. I will need two matching heads...what about 69 400 heads...would they fit?
  13. BennyK81

    BennyK81 Well-Known Member

    I could not wait and have removed the drivers side head....bad news:

    IMG_20190514_211908.jpg IMG_20190514_212256.jpg IMG_20190514_212310.jpg IMG_20190514_212329.jpg
  14. BennyK81

    BennyK81 Well-Known Member

    Decision has been made....engine goes out of the car. It's what I wanted to avoid but oh well :rolleyes:
  15. BennyK81

    BennyK81 Well-Known Member

    And please take a look at this:

  16. BennyK81

    BennyK81 Well-Known Member

    right now I am tearing down the engine in the cellar. It is very low mileage but has 2 stuck pistons, corrosion from water and probably bad core shift. I will definitly use the crank of it and the timing cover wich looks great.

    Inner fenders and core support will go to the sandblaster.

    Next step is to remove the engine from the car and tear it down.

    Here are some pics:

  17. BennyK81

    BennyK81 Well-Known Member


    Very offset
  18. BennyK81

    BennyK81 Well-Known Member

    Can anyone identify this converter? Got it with the 71 OW Trans but it was not installed.
    Is the 71 OW Th400 a switch pitch trans? It has a Buick VIN on the side.


    This 250 is the only marking I could find

  19. BennyK81

    BennyK81 Well-Known Member

    Wanted to show this one. Passenger head rear water port...:eek:

  20. Dr. Roger

    Dr. Roger Stock enthusiast

    Once pulled the head off a 400 Pontiac that made your rust look like nothing. Had so much rust build up around the lifters and springs that you couldn't even tell there were lifters or springs under it (it was caked on). It tanked up nice though and cleaned up good enough to still use. Your push rod might need replacing though :)

Share This Page