The clutch I'm using is the Associated unit, uses the stock shoes, just cut down. I cut them down, and balance them all on a powder scale. Anyway, the flywheel is smaller in diameter, doesn't stick out the bottom to engage on a starter wheel. I'll go to the stock 2 shoe clutch, like I said, the 4 shoe is overkill probabily anyway, but it is very smooth engagement...Coop