Hello, glad to find this site. Bought my 95 gmc new and drove it 419500 miles before loosing oil pressure. Pulled 305 and installed 350 L31r vortec w/ lunati 20080660 cam, edelbrock 2716 vortec to carb manifold with throttle body from SPR bored to 46 mm, headers to 3in exhaust and the custom chip kit from Harris performance.I've been having trouble w/ tuning and I hope to get right with the help on this site.