i have a stock shortblock 302 with afr 165 heads, and fti cam, gt40 intake ported by tmoss and all the basic bolt ons. the car has a lentech transmission and converter with a built 3.73 rearend (will be changing for boost). i had bought a 62mm turbo (.81 a/r) off of a hellion kit to use on my stock motor, but im wanting to go ahead and put a good shortblock in. the new boss block will get a 4" bore/3.25" stroke or a 4.125" bore/3.25" stroke rotating assembly. i figured id have about the same max power output with less boost. im wanting 550-600rwhp. does anyone have any experience with this turbo and a larger than stock cubic inch shortblock? any input will be greatly appreciated. thanks!