Agustaboy,
I am using a Centerforce dual friction clutch in my Pantera, behind a Ford Big Block. My experience is that it has a high torque capacity with a relatively light and progressive pedal effort and engagement. The Centerforce design does have centrifugal weights for increased frictional clamping force as engine speed increases. I don't know how well this system fits in a stock bell housing; my bell housing is an aftermarket QuickTime unit
I am using a hydraulic throw out bearing, which also works to reduce clutch effort by eliminating the sliding/rolling contact of the throw out fork. My clutch master cylinder is a Wilwood, similar to the stock diameter. I am very happy with the results of these parts working together.
Matt
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