I guess my question is more a powerglide specific question than a V6 question. In the Motors manual for the GMC V6 with Powerglide and in a 1967 Chevrolet C-10-60 chassis manual on all moters , on the Powerglide only it says: Through the flywheel cover opening align as closely as possible the"White" flywheel balance mark stripe and the "blue" painted stripe on the end of converter cover and housing. if scribed during removal, align scribe marks on fly wheel and converter cover. Install converter to flywheel attaching bolts etc. That is what has me wondering. Thanks, Dave