Unlike Rich, I have heard bad things about Centerforce clutches. Mostly that they don't hold up after a 1000 miles. But a lot of guys in here like them. I had my local speed shop make a kevlar/organic combo for $650. I would do that. JMO.
ALLLLLLLLL of my cars have the big, 168 teeth flywheel and 11in clutch. I have always had excellent success with 11in diaphragm clutches from parts stores such as NAPA, O'Reilly, etc.
In preparing for CB08, I just replaced the clutch in the 70 with a SB400. It was NOT having any problems, but it has been in there for about 10yrs and I felt it was on borrowed time. Since I run the 70 down the strip several times at CB, I just thought this was the year to replace it. The pressure plate looked good, but the disc was getting thin. I replaced it with one of O'Reilly's regular clutches.
Our old Chevelle went close to 200K miles on the original clutch with a disc change at about 130K. We've put over 30K miles on our L78 car and heaven knows how many miles previous owners put on it. Never had a problem with the stock GM 11" clutch. Now, slicks might have shortened the clutch life. I'll stick with stock until I see something better.
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