I built a very healthy full roller 350 and put almost 5K into the engine build. I'm running a 454 TBI unit with 95 lb/hr injectors with a high pressure fuel pump and an 18 psi spring in the regulator and a custom chip from Brian at TBIchips.com. I couldn't be happier with the end result. This engine is making 400hp and 510 ft/tq. The torque is a nice flat curve from 2000-3500 rpm and the HP is at 4000 rpm.