NASCAR P7 motors have huge flowing heads and are made to turn big rpm, and have thin rings.
Gotta think they wouldn't be the way to go with a turbo

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8