you need 4.11's to get torque, I don't think an rv cam and all that 454 tbi injectors and all that crap is gonna fly with a stock chip, you're gonna need one burnt or it'll run like trash.
Higher compression heads aint gonna get you crap if they can't breath. You should just do flat tops and 350 heads, does the same thing bumps up CR.
You really want torque ditch the exhaust crap and run long tubes and duals, no y-pipe. or if you must run a y then do long tubes and then a y pipe. I aint been impressed with any torque convertor stall and all that crap I'd stick with stock and forget it.