It's possible that your old PCM could be re-flashed and used as a spare.
My LS1 PCM had been locked, I just had it completely re-flashed for $50 by Ken Kelly (author of LS1Edit and lives near Morristown).
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1982 Z28 w/ '01 LS1 + T56, TR224 cam, Katech oil pump, JWIS chain
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