stock motors cant take much more than 10psi of boost. i just recently built my h22 with a crower stroker kit. comes with pistons forged aluminum, rods crank all billet steel any compression you want i got 9:1 for turboin my motor. also bought arp head and main studs to strengthen it all a lil more. also cant forget darton sleeves all depends on price. research what kinda power output you want. and start with the bottom end.