Thread: Roll Call for anyone with documented 1964 M21 4spd car/ 76X8 engine
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Old 01-14-2026, 02:42 PM
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Dick Boneske Dick Boneske is offline
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Maybe no help, but here is my original invoice from April, 22, 1964. 3.90 gears, Muncie wide ratio. The dealer had no info on the M21.

I have heard many times about the M21 availability in '64 but never saw one. The stories are about as common as the factory Tri-Power '67 GTO.
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Click image for larger version Name: Phil Tolkan Pontiac Black '64 Invoice 003.jpg Views: 28 Size: 134.1 KB ID: 663651  

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