My Federal-Mogul shop specifications book lists the size of a std. diameter rear main bearing journal as 2.777" +/- around .0005". That makes the seal surface about 0.100" larger than the rear main.
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!