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my '67 427 has blank stamp pad. info on GM engine replacement during assembly with unstamped engine pads???
Options:
1. Engine pad may have been cut and numbers removed when decking/rebuilding.
2. If new GM, then it started life a a bare block with no internals or a short block. If it was a complete engine it would have an assembly date and engine suffix stamped into the pad. There would be no VIN.