I have a 327 with powerglide and the starter went bad. It was not the original starter. How many teeth should be on the starter gear? The one i took off had 11. The OEM replacement I bought has 9. It’s the starter with two sizes of bolts.
You generally count the teeth on the starter ring attached to the flex plate or the fly wheel, not the starter pinion gear. 153 teeth designates a 10-1/2 inch clutch on a base engine. 168 teeth on the 11 inch clutch fly wheels were used with big blocks and high horse small blocks. You have a base engine 327 (275 horse) which came with a 10-1/2 inch clutch manual or a 153 tooth PG flex plate. As such you use the starter with two bolts side by side as seen in this photo:
The orange colored starter has diagonal bolts to attach it to the block; so it is intended to fit a BBC or a high horse SBC (it will be for a 168 tooth flywheel). Hopefully you have the bolts side by side to match your starter ring or there will be teeth shed and added expense.
The picture below is of a high torque starter used on big blocks and small blocks factory rated at more than 300 horsepower:
Note the long brass tube that is spacing out the distance from the energizing lug at the front of the motor from the solenoid that supplies the power. This is for a 168 tooth flywheel. A base engine starter has a shorter electrical motor so the energizing lug at the front of the motor touches the solenoid directly without the long spacer.
Yea, I have a hand full of old steel starter heads laying around . those are the only ones that seem to work for "MY" 302 manual set up.
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018