[flatjack9]

I am well of aware of the effects of inertia. So you are telling me you can feel the difference between a 10" and an 11" clutch? The flywheel is the same for both and the radial difference in pressure plate and clutch disc is 1/2" and the effect of the larger clutch disc would be imperceptible. That and a flathead is rarely spun more then 3000 rpm in a street application. Give me a break. Listen to the people who drive them.