my 1974 repu flywheel has a #2 stamped on the back and has 9 bolts for the clutch. my question is this. i want to upgrade my transmission to a TII trans. would i be able to use a GSL-SE flywheel counterweight? i was looking at mazdatrix site and they list the counter weight from 1976-1985. are 1974-75 rotors different?