I'm in the process of building a similar stroker engine that uses 292 connecting rods, but without the oddball grinding of the center of the rod journals. I made thrust washers for both sides of the 292 rods to match the width of the 235/261 crank journal, and TIG welded them to the rod caps, then reconditioned the rods to be sure any warp or out of round from the welding was corrected. I'm also using regular 235 or 261 pistons instead of the scarce and pricey Cadillac ones. I'm using bronze bushings in the small end of the 292 rod in the 235 engine, and Teflon thrust buttons to keep the original wrist pins centered. The 261 wrist pins will press fit into the 292 rod.
"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!