my 427 has no low end torque and wont really run untill about 2000rpms. has a 850 demon air gap intake solid non roller cam and factory hi-perf corvette rectangle port heads flat top pistons roller rocker t56 6 speed and a 342 gear all in a 79 trans am. I am curious about the heads i have been told these heads arent great to use with a mild street motor and are better off on a high rpm motor. could this be my problem? The timing has been set every way possible and i still come up with the same problem