My 94 Z28 is stillnot running good since i rebuilt the motor. I have had a custom tune by I on and MadZ28.com and I just hooked a computer up to see if It woul dshow me anything and it doesn't. The motor feels like it is in a bind at takeoff and it smooths out until the Torque Converter locks up in O/D and the car studders really bad then. I am really getting worried about this problem. If anyone can help me please do. THANKS!!!

LT1, forged pistons/rods, racing bearings and rings, Comp 218/224 camshaft, 1.6:1 roller rockers, ported and polished heads with 2"intake and 1.55" exhaust valves, hooker headers, hooker catback, custom computer tune.

 

Need more info.
Size of motor? You said rings, some either you bored it out or just replaced the rings. Did you properly set the rings up?

Cam looks good nothing to radical there.

Oil pressure looks good? What about bearing clearances? What were they setup? And just about anything else that you done to motor or anything that still is or not attached to the motor.