buzz, i know this is not what you wont to hear and ive had a lot of them over the yrs. but if i was going to build one more blower motor today for the street , it would be a good "stock 454", 671 GMC blower, 7.5 comp., and about 8 lbs. of boost. it would have EFI and i would drive it on pump gas. it wouldnt stand a lot of top end running but it would be a bad ass from stoplight to stoplight and i havent broke the bank eather. youer going to have more power than you know what to with anyway. that blower is going to fill the cylenders up with air & fuel wheather you wont it to or not. i sure wish id had someone to talk to about blowers befor i built my first one. im sure it would have saved me a lot of money ive got more pistons with holes in them than i care to think about, so talk to a lot of people, but dont try to do everything everybody tells you to. what you need to do is keep the comp. & boost down, keep the timing late and keep the fuel flowing. id go for pretty this time.