That same rod bearing fits several truck and agricultural engines- - - -Case, Mack, Buda, etc. It's about 1 15/16" ID, compared to the GMC bearing which is 2 5/16". That allows for a 3/16" offset on the rod journal, allowing a 3/8" stroke increase. The bearing is almost exactly the same width as the GMC bearing.
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!