Pistons rings on 1948 6-cylinder

Can anyone tell me if the rings for a 1953 (239 6-cylinder) will fit pistons for a 1948 6-cylinder. They say that they are for a 3-9/16 diameter piston which I believe is the same as the 48 piston. This is the description of the rings -

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[h=1]Details about 1953-1966 Pontiac 194,239 3&9/16 bore + .040 chrome piston rings[/h]

Thanks,

Jim

my 1954 pontiac master parts catalog says no, 53-54 pontiac six cylinder rings are different than 41-52. charles coker, 1953 pontiac tech advisor.

checking some more, your rings have a thickness of 3/32", 53-54 rings are 5/64", same diameter though. maybe you could use a 1/32" ring with the 53-54 rings to make up 3/32".

Thanks, that's sort of what I thought.

Jim