I have a 68 camaro 396. Recently bored to 408, in the rebuild we used kiethblack preformance pistons, a comp cam 270 H and comp cam lifters. we cut the valve seats and valves, rebuilt the distributor with a Petronix Flamethrower kit, and besides that the heads have been ported and a set of headers attached. all that said im sure your sayin what could be the problem? but for some strange reason it wont turn over 4 grand. Any Ideas of what could be wrong?