62-65 early model speedometer gear Chart?

WV64Signet said
With apologies to the OP for a minor hijack along these same lines.

Has anyone used one of these to calculate gear tooth count?

It comes up to 41 tooth... Which based upon the follow-on charts is accurate as I've used navigation apps to track speed and compare to tach.

Seems off to me. What am I missing?

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Never seen a calculator that works for Early A's. If it has a 41 tooth, definitely not for our cars.

If you don't have a technical service manual for your year you should really have one. That's probably what's missing.