I am thinking of building a 500 inch 440 based engine for my 300G.It will have a 62 727 w/parking drum behind it. Stock valve covers are a must and a hyd cam. The factory long ram or if I can find the "short" version intake. Pump gas,3.23,29" tires. Unforntunetley probably stealth heads and shorty headers,3" full exhaust. How much would the extra cubes tame these intakes? Rod length same question? Camshaft? 4300# curb wt. I full well realize this is no racecar but I don't want it to nose over at 3500 either. Difficult unusual question I know but any thoughts? thanks, Steve