Stop in for a cup of coffee

WV64Signet said
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View attachment 1716092944

My Galen pocket book doesn't list pistons but Google helped out and brought me back here to FABO. Those are 66's for sure. Without a parts book it is possible Ma Mopar used those for a few years.

https://www.forabodiesonly.com/mopar/threads/early-a-v8-4v-relief-stock-pistons.428846/