Can anyone tell me:

Re: 1983 Trans Am with GM corporate 305CI engine.

#1 what is the Diameter of a Stock Flywheel. ( inches )
#2 How many teeth does it has:
Year: 1983
( 305 CI V8 with stock 5-speed manual transmission)

I am trying to find out which part number to order for a Power Master Chevy Gear reduction High Torque starter, for this application.

Jackpiner......

 

If you are running the stock T-5 Transmission that means you will need the 153 tooth flywheel. I'm not sure of the diameter. If im not mistaken there are just two flywheels, the larger 168 and the 153.

 

in my 83 i had a 168.

 

The factory flywheel for all 3rd gens is supposed to be:

12-3/4" 153 tooth.

82-85 are for 2pc rear main seals and 86-92 are for 1 pc rear mains, not interchangable.