I think that both the 6v and the 12v starters had 9 teeth.

I think the pitch/size (?) of the teeth differed.

Would someone please correct/confirm this?

Thanks,

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.