307 V-8 pistons fit a 250, which has a different bore size and compression distance than a 292, I believe. Are you looking for a compression increase? Get yourself a Speed-Pro piston catalog, and try to find a piston with a similar bore diameter, compression height, and wrist pin size, and possibly a similar wrist pin offset. There are 3 types of pistons, cast, Hypereutectic cast, and forged pistons. The cast pistons are good for stock rebuilding, the hyper types are considerably stronger, and fit with reduced skirt clearance, and the forged ones are mostly good for race-only applications because of the wide skirt clearance they have to run. Forged pistons in an engine that has to run mufflers make a lot of noise. The wide clearance also promotes a little oil consumption, not a problem in a racing situation, but it's a pain in a street machine.
Jerry
