I just helped a local bolter install a Saginaw 3-speed in a 1960 model 1/2 ton, and I had to machine the bearing retainer to fit his bellhousing. At least some of the full-synchro 3 speeds had the big bearing retainer diameter to fit the bigger bellhousing hole.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!