save yourself some money, convert the LT1 to carb (they make kits) get some nice AFR 220's or something to that effect, get someone to build you a bottom end PROPERLY. and you can run a 150 wet plate and a 200 direct port all day long on it. you can make it much more street friendly and spray the extra power when you need it....personally i would suggest going to automatic in this transistion aswell your not going to make use of any of this power if you cant go 1.3's

or ...if all else fails...find some ported stock LT1 heads, build a decent bottom end, and turbo the car. PT76GTQ will give you nice spool up, and put you right at 600-650rwhp at about 10psi with a 355. and stockish heads