I once used half a set of 85 HP flathead Ford rings in a big-bore Volkswagen engine when J.C. Whitney refused to sell me a set of rings - - - -they wanted to sell another complete kit- - -cylinders, pistons and all. The bore size just happened to match the 3 1/16" + .040" Ford cylinder size. I did have to open up the compression ring grooves a few thousandths on a lathe so the rigs would fit the grooves. That same rebuild involved honing the wrist pin bushings and piston bores .015" to accept a set of Corvair wrist pins due to wear on the original pins.

That engine went another 50,000 full-throttle miles- - - -the only way to drive an air-cooled Volkswagen!
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!