My parts eater just finished off my oem starter.I was going to buy one from pa-performance starter but, I have a question. I'm finding listings from different part mags. for starters. 3-speed, 4-speed, auto etc. Everyone is different. The car is a 66 but don't remember the flywheel year and the block is a 72 on a 28oz balance. The car had a 3-speed and I replaced it for a toploader. I'm guesing that it is a 157 tooth. Any other guessers? Can pa-performance tell me by the number of teeth on the starter?