That casting number 839754 777 is the same as the 9 bolt clutch flywheel I have that has the 139 teeth for 6-volt starters. I suspect that the D8 6 is the date code, meaning April 8 1946. If it were 1956 it would be a 12V. You can be sure by counting the teeth.

Last edited by klhansen; 11/03/2026 5:49 PM.
Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.