Looking for a 21-2200 stall (per Comp Cams recommendation) lockup 27 spline for cruisin behind a moderate V8. Finding rebuilders are using lo-po V6 cores due to a shortage of high performance cores. Some say this doesn't matter? In the aftermarket B&M for instance doesn't offer them, others like TCI have some bad reviews. I don't think I need a $500+ TC? Recommendations would be appreciated.