I have a customer's car ('68 cuda vert) that we put a pretty hot 340 six pack into and he provided the clutch, purchased through Mad Dog Racing, PN 12014.
Question is on quality. I prefer centerforce stage II or dual friction and am rather leery of the MD clutch.
Installed it but have a concern as it started getting very hard to use after a short test drive. Major creaking and unpredictable engagement. Pedal feel is horrible, as if I am getting a major work out. When cold seems sort of okay, but still a way stiff for a diaphragm clutch.
Also, no over center spring as we remove typically with a diaphragm pressure plate.
Any input would be appreciated.

Thanks!!!