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i got a edelbrock rpm gap intake with 600cfm performance series carb...love it...put it on and its ready to go for the most part....i have dynoed yet but i think i gained 40-60 hp from it at least it seems w/e u want though hollys are easier to tune but edelbrock is good out of the box
the summit 600 cfm (holley 4010 revised) is a good deal and very much like an autolite 4100, othewise I recommend a road demon 525 annular (flows 600 cfm)