Ststurbo???

yep turbos for the street! turbos work awesome for a street car cos they only boost when you load it up, improving the MPG.
and they are very easy on internals, Iv seen 800hp eagle rods in a 1450hp turbo 454.
under 10 pound of boost ya dont even need forged pistons, if ya still only want 550hp id use 8.5 KB flattops, peened stock rods n a stock crank.
there are so many blow thru carbs and hats you can get as well as intercoolers the list go's on 8) price it up mate, see if its cost effective.
P.s turbo+4speed=prefect!