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Frame width for BBC

Discussion in 'The Hokey Ass Message Board' started by trbomax, Oct 22, 2013.

  1. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    My '28 has an inside frame width of 28". The SBC fit just fine,but my plan is for a BBC.How much inside frame width is needed for a BBC? I had planned to run 66 corvette exhaust manifolds since they are very tight to the block and make the most power of any cast manifolds. I do not want tube headers. Anyone have one in thier car that can get an inside dimension?
     
  2. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    Nobody has a car with a BBC???
     
  3. 1971BB427
    Joined: Mar 6, 2010
    Posts: 9,669

    1971BB427
    Member
    from Oregon

    I've got a couple in cars, if you need more exact dimensions, but here's a great site link to popular US made engine dimensions:
    http://www.carnut.com/specs/engdim.html

    As you can see the overall width is 27", so factory manifolds should put the exhaust outside the frame rails, or very close. Depends on how high it will sit in the chassis, and how you run the exhaust.
     
  4. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    Thats a pretty interesting page! Thanks. It looks like there is a frame clip in the old girls future.I can go about 33'inside without haveing to make fender mods (which I dont want to do).The length is of little concern because I'm not running a hood and can just move the rad shell ahead as needed.I'm not going to use side motor mounts either,so that will free up some space.
     
  5. 1971BB427
    Joined: Mar 6, 2010
    Posts: 9,669

    1971BB427
    Member
    from Oregon

    Are you going to use a engine plate front and rear, instead of side mounts? Hope you aren't planning on mounting it like the '55-'57 Chevys were, unless you use a bellhousing mount too. That's a lot of torque to control! Should be tons of fun in that little/light car!
     
  6. SimonSez
    Joined: Jul 1, 2001
    Posts: 1,664

    SimonSez
    Member

  7. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    I am useing a front plate with 55 chev buiscut insulators,and a steel bellhouseing with 55 chev rear insulators. The trans will hang on the bellhouseing.
     
  8. I've seen BBC's in model A's in the past bit I don't think the had hood sides. HRP
     

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