Ok guys, gettin near time to order an engine. Its come down to two choices for me. HT383 or a ZZ4 shortblock and custom build it. HT383: Pros: Complete Package Low end torque Non-bored block but still 383 Excellent crank Excellent block Cons: Non roller rockers Press in studs Single roller timing chain Somewhat flat cam Small valves in the vortec heads Push in studs ZZ4 short-block custom build Pros: Great bottom end Probable Edelbrock E-tec heads Dual roller timing chain Roller everything Choice of cam Have everything exact and up to date Screw in studs Cons: Take longer to get together Wont be a turn key type deal Might cost a bit more On either of these i will probably put on Edelbrocks EFI system, but here is my main question. Are the non roller rockers, flat cam, push in studs, and single timing chain enough of a handicap to do the custom zz4? This truck is a DD/mud/trail type truck. The two engine will end up near each other in price (within $500). What are yalls opinions as i value them... P.S. I swear, once this is done w/ i will be orange. This engine is nickel and diming me to death at the moment.