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  • 2 Post By rspears
  • 6 Post By techinspector1

Thread: chevy 350 swap
          
   
   

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  1. #1
    efregoso is offline CHR Member Visit my Photo Gallery
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    chevy 350 swap

     



    Hi all, so I have a 72 buick skylark with a buick 350, and a th350 trans. I want to drop a chevy 350 into it, and I'm looking to get an accurate idea as to what this swap will look like. I have read some posts that say it is an easy swap, that the chevy350 fits right in and bolts up to the th350 trans. however, i have also read that it does not fit, i need new motor mounts and a different tranny. Any advice?

  2. #2
    firebird77clone's Avatar
    firebird77clone is offline CHR Member Visit my Photo Gallery
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    I wouldn't expect the trans will mate up.

    B.O.P. = Buick Oldsmobile Pontiac. Any of those should mate up to it, but not Chevy.

    If you have to change transmissions, then potential problems are driveshaft (length and yoke), shifter linkage, and cross member.

    Engine issues: exhaust, radiator hoses, linkages, mounts,
    .
    Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
    EG

  3. #3
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
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    The TH350 wasn't a "BOP", it was a CBC Project, Chevrolet-Buick-Combined - The Novak Guide to the GM TH350 Automatic Transmission. I don't think you'll have any problems with your '72 Skylark swap.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  4. #4
    jerry clayton's Avatar
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    The dowel pin and lower block bolt holes line up---------above the dowel the BOP trans bell housing curves in more-there are some 1/4 adapter plates available

  5. #5
    rspears's Avatar
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    Quote Originally Posted by jerry clayton View Post
    The dowel pin and lower block bolt holes line up---------above the dowel the BOP trans bell housing curves in more-there are some 1/4 adapter plates available
    Looks like I was wrong. There are two bellhousing designs, even though the tranny was CBC. You'll need the adapter, as Jerry points out.
    Last edited by rspears; 01-04-2016 at 07:57 AM.
    Roger
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  6. #6
    jerry clayton's Avatar
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    Common item less than $100 from many sources---tranny places, Summit, Jegs,Speedway, Wilcap,etc-------

  7. #7
    rspears's Avatar
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    Quote Originally Posted by jerry clayton View Post
    Common item less than $100 from many sources---tranny places, Summit, Jegs,Speedway, Wilcap,etc-------
    Common sense would say that when two divisions of the same corporation are working together to develop a new piece of hardware (CBC) it would be common to both lines, but GM continued to spend tens of thousands of dollars to support continuing the differences. Not sure who in the executive ranks had the stroke to make that happen, but it doesn't seem smart. I suppose that it may have been a labor issue, as going to a common design would have resulted in fewer workers needed. No big deal, just interesting history.
    Roger
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  8. #8
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    I'd be thinkin' Buick 455, not Chevy 350.

    .
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  9. #9
    efregoso is offline CHR Member Visit my Photo Gallery
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    So I went with a 350 vortec motor. I now have a concern, as I know the vortec is a fuel injected engine, the distributor runs off computer. I have two questions.
    1) I was wondering if anyone knew how to mount an old distributor onto this engine, and where, so I could run it carbed?
    2) if running it fuel injected off a computer would cause a problem with the th350 shifting capabilities? Or if this could be bypassed with a pcm reprogram

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