1954 was the introduction year for the 6 mounting bolt pressure plate on clutches larger than 9".
That is something I didn't know until today.
Prior to 1954 pressure plates that use a clutch disc larger than 9" used 9 mounting bolts and 6 mounting bolts on 9".
In 1954 pressure plates started using 6 mounting bolts regardless of size.
1953 Clutch spec. (Bottom of page) Clutch attachment to flywheel.
1954 Clutch spec. (Bottom of page) Clutch attachment to flywheel.
Thanks for the education.
