another question

OK, I’m going back to my previous question, and expanding on it. Had a thought (look out!)

The 300/360 crate has a cam spec of 250/264 with .385/.401 lift roller cam. The 360 I built has a 268/276 with .429/.444 flat tappet. The crate has a 9:1 CR while mine has a 9.6:1 CR. MPP suggests a 750 CFM Holley for this crate engine. Both engines have the magnum heads-stock valves.

I went to Holley’s web site and used their carb selector. In the results for a 365 street engine, vacuum sec’s, electric choke, mildly modified, 6k rpm, the 770 St Avenger keeps coming up.

I am using a 3” x 14” dia. K&N with the x-stream top, a functional 440 scoop, Aluminum Radiator/shroud, B&M trans. cooler, 7 blade fan. A Crosswind ‘Airgap copy’ intake, TTI headers w/2.5 exhaust with an x-pipe. Holley blue electric fuel pump. It seems that I would be moving a lot of air into and around the engine, keeping it kind of cooler as well.

My question is, keeping in mind there is a ratio of air/fuel to go through the intake and a cooler engine, would it be better to go with the 670 Hooley and re-jet it higher or go with the 770 and re-jet it leaner?