Thanks for the offer. I do not need any right now, just finishing assembly of a 261, new rings, bearings, oil pump, cam and lifters. Hope to have it running soon. I was just curious about the unusual piston.
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1954 Chevy 1300 engine 235 (1959)
1955 (first series) Chevy 3100 engine 261 (1957)
1927 (other brand) Model T- engine 327 (1968)