Clutch diameter differences?

Guys,
Thanks for the good discussion. I actually did not get 31 years out of one clutch, but I got...I guess 15-18 years, which is why when the "new" one died after only 2 years, I was looking for a way to "fix" it permanently. When the previous clutch died, it did not even really wear out, the anti-chatter spring retainer broke, so I had to replace it, even though the clutch material still seemed OK.

Since I am not into any kind of performance out of this vehicle (except maybe better gas mileage) I guess I'll stick with another stock clutch.

I appreciate all of the ideas.

Bill