Yes, the early 327s and the first year or two of the "302" had a small journal crankshaft. Early 283s had enough cylinder wall thickness to bore them .125" without getting into trouble before the 327 was introduced in 1962. At one time there was a set of main bearings available with thicker steel shells to adapt a 350 block to a 283 crankshaft. Those bearings are VERY scarce these days. It's also possible to leave the main bearings in place on a 350 block and line bore them to accept a set of 283 mains. That way, a 4 bolt main 350 can be turned into a really bulletproof 302.

Here's a real Rube Goldberg idea- - - - -a 400 small block with a destroked 283 crankshaft- - - - -4 1/8" bore, 2 7/8" stroke- - - - -307 cubic inches!
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!