what holley 425
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500, 472, 425, 368 Discussion, what holley 425 in Cadillac Engine Technical Discussion; can anyone say what the best holley carb for a 425 is ? thanks...
  1. #1
    inky is offline Cadillac Owners Member
    Automobile(s): 77 425
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    what holley 425

    can anyone say what the best holley carb for a 425 is ? thanks

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  3. #2
    deVille33 is offline Cadillac Owners Connoisseur
    Automobile(s): 1977 Coupe (blue), 1977 Coupe (yellow), 1977 Coupe (green)
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    Re: what holley 425

    As far as I am concerned they do not make a good replacement Holley for the Rochester. Holley did make a spreadbore as replacement, but they are rare and hard to find. The Rochester will flow up to 850 cfm. and you can tailor that, but it takes a lot of study. Believe me, stay with the Rochester. I should start rebuilding some of the carbs I got hanging around.

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