Give me a little time, and I'll look through a couple of piston manufacturers' catalogs I've got. I think I can come up with a close matchup for a 292. It might requre a little fitting, but there's usually something that's close enough to improve the performance. I wound up with flathead Ford V-8 pistons in an air-cooled Volkswagen engine many years ago! Hottest thing on the street!
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!