My Federal-Mogul master bearing catalog lists the following crankshaft forging numbers for 1954-61 235 and 261 engines with the same connecting rod and main bearings for all of them:

3701486
3701488
3701488A
3770327

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!