| The smaller 157 Tooth Flywheel is common on earlier 65/8 Mustangs, Cougars, etc and take a 10" or 10.5" Clutch were as the Larger 164 Tooth Flywheel is common with 69 and later Mustangs, Cougars, Falcons and will take a 11" Clutch. There are also two balance weights used, early engines(most Common)28oz and the later Model Windsors with the 50oz balance. Maurice Kiwi - researching for scratch build |