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What do I need to replace my Z28's 350 with a BBB-455?

Discussion in 'U-shift em' started by 70 gsconvt, Apr 7, 2010.

  1. 70 gsconvt

    70 gsconvt Silver Level contributor

    Hi, I was wondering if anyone could tell me what I'd need to put a 455 in my 1978 Z28. It's a factory 4-speed car with the original 4-speed Borg-Warner T-10 transmission. Currently has the factory 350 engine (a whopping 185HP).

    I'd love to put a 455 in there. Even with a mild build, the weight would be almost the same and I could double the HP and probably triple the TQ with just a mild build on an engine.

    I've seen the BOP bellhousings, #9778882. Is this the correct bellhousing that I'd need to put on the trans to bolt up a 455? Also, what else would I need to do? Thanks.
     
    70 gsconvt, Apr 7, 2010
    #1
  2. sailbrd

    sailbrd Well-Known Member

    Have to take a big gulp here to say this.... put a chevy in it. Boy that was hard to do. :laugh:
     
    sailbrd, Apr 7, 2010
    #2
  3. 70 gsconvt

    70 gsconvt Silver Level contributor

    My first thought was a SBC 421 or 434. Then I was thinking about a modern 6.0 or 6.2 out of a Chevy truck with L92 heads.

    But I have a 1976 455 just sitting in my garage. It's got all the accessories and brackets. All I would need is a stock bottom end, a decent set of heads and a nice cam with an Edelbrock intake possibly and some headers.

    And presto, instant go-fast Z28. Combine the trans with a 3.08 rearend with rear discs I can pick up for dirt cheap, and I'd have a great cruiser.
     
    70 gsconvt, Apr 7, 2010
    #3
  4. BUICKRAT

    BUICKRAT Got any treats?

    What you need is the ability to "make it work". There is a guy on the board that has a 71-72 camaro with a twin turbo 455, "skymaro" may be his ID...maybe he will chime in...
     
    BUICKRAT, Apr 7, 2010
    #4
  5. william.ali.kay

    william.ali.kay Needs more cowbell!

    I cant help you with your question, but I would LOVE to see it when your done! Its kind of cool to see the reverse happen( Buick motor in a Chevy).
     
    william.ali.kay, Apr 7, 2010
    #5
  6. 71gs3504sp

    71gs3504sp Well-Known Member

    Hey

    I be second to say stay with the stock Chevy 350 with hidden modifications. If its an original 78 Z28 with 4 speed, not many around! Keep it original!!!!!

    George
     
    71gs3504sp, Apr 7, 2010
    #6

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