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Old 10-09-2011, 02:22 PM   #21
jdheff1982
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Join Date: Aug 2011
Location: Wichita, KS
Posts: 318
Re: carb to quadrajet

Vacuum secondaries run off existing vacuum to open them up. Mechanical is just linkage and more reliable.

Just do what you want to do. I bought the 750 because of the price. I mean, if you are just running a stock engine, then the 750 probably is too big, but that doesn't mean it can't be tuned for your motor.
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