301 4 speed flywheel
 

Doing a swap on a Trans am with a 301 auto to a 4 speed . Trying to find a picture of a 301 flywheel from the back side for id. Have wrecked a 301 4 speed car and have many flywheels but they are not labeled . Any help would be appreciated. TANKS

301 flywheels & flex plates should have an extra big piece of metal in 1 spot that acts as a counterweight, same for the balancer. 301 cranks dont have the same counterweights as the traditional Pontiac V8s so they add weights to the balancer & flex/fly wheel.

my 301 4-speed flywheel

Or in the case of 301 flywheels, it looks like theres actually a piece of metal missing on the outer ring for balance, 301 flexplates have an added piece of metal.