What type of power needed to compete, with a 427 chebby? (Not stock 427)

7432.6.... -___-....The 427 is supposed to run 450 on motor. And it will be a while before we both get both motors in the car so far all i need is my driveshaft shortened.+ cam+intake etc.. So what do i need to get this going, i meant re-ring to handle boost, or deck the block for more comp by the way, not that it would instantly give power. Any and all help,is appreciated. I can also get 452 heads for free ported and polished (not by me). So basically i would like to ask is, what cam, for ported and polished 452's,(maybe slightly milled) decked block, and re-ringed. What size headers? and what intake. What i have on hand already is a speed demon 750, and torker manifold, no headers as i need to find some now for bigblock. What cam would be sufficient for this build? Im mainly looking for around 500 ft/lbs crank, and 425 hp. Ive already rounded out cost, to be under 4 for used intake, and new cam and lifters.maybe cheaper..