"You will be bidding on an 10.5" or 11" - it will fit EITHER size Clutch. It is a BRAND NEW Pontiac 166-tooth flwheel. This is for INTERNALLY balanced motors -- 350 - 455 Engines - 1964 to 1976 with the 2 3/4" crank shaft hole."
I've seen this comment before - whats the meaning/definition of "internally balanced" with relation to our FGF engines?
'68 428 HO M3 Monster, 4-on-the-floor! Need I say more?