Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Edelbrock 600 vs. Holley Double Pumper
My .02 here. I think you would notice performance from a 750 Holley. You may notice a more crisp response with a 650 but its hard to try to tell people this. I would not go above a 750. For what you are saying about driveability, I would go with vac secondaries. Sounds like you are running a dual plane manifold . At your elevation, I would begin jetting out of the box and read from there. I have 3310-4 and run 68 / 76 with 65 power valve. I have run it from 0 sea level to 6k ft with some slight over jetting but its only tempoary as I come back to 3500 altitude as home base. I run the Airgap rpm, dual plane.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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