I know you guys here run your stuff hard. Heres my setup, I'd like to hear what you think I'd be good with, power wise. Current setup dyno'ed at 800HP .....Mark IV 454 Block. .060 over. GM uncut Steel 4'' crank, ARP main studs, 4 bolt main, standard caps, Manley H beam rods with ARP2000 bolts, JE Blower pistons with upgraded pins. Max RPM 5700-5900. Externally balanced How much power would you feel safe putting through this block setup? I've considered adding a little more power, but worried about the production block and GM crank?