Call Dwayne Porter. Fast68plymouth on here.
Do it once, do it right. He is a comp cams dealer and knows his stuff. Has been dead on with my cams over the years.

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, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17