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BB Caddy motor ID

Discussion in 'The Garage' started by mudhound72, May 8, 2005.

  1. mudhound72

    mudhound72 1/2 ton status

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    I have a BB Caddy motor in my Burban that I bought think it is eather a 472 or a 500ci, is there a way to find out what I have without a tear down or pulling it out.

    All that I know is that a 500 was made in 75-76.

    It has a HEI, a q-jet, and a egr, cast iron intake.

    Anyone have a clue, are there some easy casting numbers to find and if so what are they.


    Todd
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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  3. Ned Kelly

    Ned Kelly 1/2 ton status Premium Member

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    Pull out one spark plug and turn the motor over manually, measure the stroke. To do this, put a welding rod in or coat hanger into the cylinder, and turn the engine manually until the piston reaches TDC.Mark the rod. Now turn the motor manually until you reach BDC. Mark the rod. 500 will have 4 1/4" stoke, 472 has a 4" stroke. Hope I explained that properly.
     
  4. mudhound72

    mudhound72 1/2 ton status

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  5. Ned Kelly

    Ned Kelly 1/2 ton status Premium Member

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    There was some cam talk at http://www.hwforums.com/2089/ awhile ago about cams. The 1970's OEM cams were hampered by emissions requirements and therefore VERY POORLY designed. Do a search and maybe you'll find the thread (I believe Lynn Nichols on that board had a very good post about the subject). So basically, one of he best upgrades would be a MT3 or MT5 cam to replace the OEM slug stick in there right now.
     
  6. mudhound72

    mudhound72 1/2 ton status

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    I did some reading into perf up grades, and it would not take much to pick up HP, and still keep gas mileage. A cam would be the #1 thing to do, that and it sounds like I have a stuck lifter :(
     
  7. muddybuddy

    muddybuddy 3/4 ton status

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    hp?

    how much hp and tq did those bad boys crank out stock?
     
  8. mudhound72

    mudhound72 1/2 ton status

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