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  1. brianbailey440

    drilling air bleeds on a holley 750 vacum secondary carb

    i have been told that drilling my air bleeds out on my 750 holley will make a huge difference in throttle response.i have a friend that has done this many times, and swears by this. im just curious if any of you guys have done this with good results.he told me to drill all 4 rears to .032, and...
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