You can use a flywheel from any small block V-8 from 55 through 86 and a 6 cylinder from 63 up. It will be a 168 tooth flywheel.
If you are planning to use your original clutch you will need to get the flywheel that matches the clutch. It could be either an 11" clutch or a 10" clutch. They are available used at swap meets, craigs list, etc. Napa also has them new.
Fred
