[Curt C.]

David, not sure about your application but I am sure Centerforce makes a product for that tranny. Sid, 28 or 50 oz has to do with the crank balance of the motor. Most 351W use a 28 oz balance dampner and flywheel while 302's use 50 oz pieces. Ask your engine builder. He should be able to tell you whether your motor is 28 or 50.

Edit: By the Way, Centerforce uses little weights on their clutches that result in OEM pedal effort. No stiff leg!