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Thread: bbc heads 049s or 781s???

  1. #1
    Senior Member SENIOR BUILDER
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    bbc heads 049s or 781s???

    going to put 2.19 intake valves in and some bowl work what heads will do better and have higher comp? so say 049s some times have a 122cc combustion chamber?????
    if something goes wrong there is always the cooler!!!

  2. #2
    Senior Member SENIOR BUILDER
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    with kb 257 pistons what compression will they yeild??
    if something goes wrong there is always the cooler!!!

  3. #3
    Senior Member DYNO OPERATOR bixblk's Avatar
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    Dec 2004
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    heads

    I have a set of 781's just out of the machine shop, ss ,o/s valves no springs . 681 dollars worth of work taking offers let me know
    jeff 708-308-0282

  4. #4
    Junior Member SHOW GUEST
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    Nov 2005
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    Yes those heads can have huge chambers and ya gotta cc them..I had to get a lot milled my 049's to get it down to 118. I think the 049's/781's are pretty close in terms of port desgin&size. They flow well as even a stock set can flow 270 cfm on the intake!

  5. #5
    Senior Member RACING JUNKIE
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    Take a look at the 820s, you may like them better.

  6. #6
    Member JUNIOR BUILDER
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    ny
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    I have a single bare reconditioned 820 head. Oven cleaned, shot blasted, mag checked, bronze liners honed to size, hardened exh seats, 3 angle valve job and resurfaced. 2.065 int and 1.72 exhaust. Casting #3993820.
    $475.00.

    (315) 343-6030 days
    (315) 343-3666 eves


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