socket a p06 or p28, p72's are a pita to work with. but if you really want, i have a great condition rare virgin obd1 p72 i'll sell ya lol. the biggest things you can do before boost is your tranny. a GOOD clutch that has a torque rating thats higher than the peak torque you think you'll ever make is a NECESSITY. if your going to be building your block, an lsd is a NECESSITY. i reccomend a quaife lsd, and a clutchmasters stage 3 kevlar/carbon clutch disc. honestly for a street car, building the block is a waste of time and money. b18c's are rediculous motors, and are strong enough (when properly tuned and without detonation) to stand about as much hp as you can legitimately make on pump gas. unless your going to be running race gas constantly, you'll never really need to have a built bottom end. that and much more than 250 whp on street tires (again, unless you run slicks all the time) is an effort in futility, you'll be spinning your wheels well into 3rd gear.