too much for pump?

[Majik16106]

somebody with more experience please help. im spec'n out this 500ci mopar and i have like zero experience with carb'd motors. so we were planning on like a 850cfm carb.. like an msd dis 4 ignition. 10.5:1 c/r with aluminum heads and cam card looks something like a lunati voodoo .585/.600 249/255 and 108ish seperation. im thinking that may a little extreme for a street car that will only run on pump gas.. even with a vaccum pump. car is manual trans. and only trying to get to a tad over 6k in it. aluminum mild ported intake manifold. but maybe i should step down to sat 112ish seperation on something like .480/.495 at 238/246 which is an edelbrock performer rpm. anythoughts. looking for 500hp on 93pump and desktop dyno says 1st combo is good for 674ish.. awesome. any thoughtS?