cam thoughts
with the new cam you might want to bolt something a bit bigger on if this is all-out race
750 holley covers a very wide spectrum though. if you had the right one that was jetted/tuned/etc it would get the job done. if you have an out-of-the box 750 you would probably do better with something a bit larger.
if you do the holley interactive carb thingy with your specs it seems to suggest a 800-850cfm with mech secondaries / manual choke.
http://www.holley.com/applications/CarburetorSelector/CarbSelection.asp