I'm using an edelbrock 750 CFM QJet #1401 with the stock engine on my 71 CST outfitted with hedman headers and an edelbrock performer intake. Performs great, but boy does it eat gas. The POS's installation of a 14 gallon gas tank doesn't make it any better. If I were to do it again, I'd go to a 600-650 CFM.
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71 Blazer CST
72 K20
Capt USAF
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