Centerforce-I got the single friction. Didn't get the dual friction. Rosser had the single in stock and I didn't want to wait for the dual. Great clutch though. Get their pressure plate too. Has little weights that help with clutch pressure.
We have a local guy building clutches, it's great, you tell him what your gonna use it for and he picks out the best pieces, I'm still running the one he made in 86 or 87, and I never baby it... Call some racers in your area , and see who builds a good clutch, he may know some good tricks.
This topic has been discussed at length here. Try doing a search. But my 2 cents, again, Centerforce is a waste of money, especially in a 4by. A centrifugal clutch in anything other than a pro bogger or desert racer is a waste. I recommend LUK, been using them for many years.
Hmmm...I still like my Centerforce. Got it cheaper than a Luk at the time as well(Rosser was running a special). But then again I was still running my stock clutch until I changed my tranny so I have nothing to compare it to besides the stock Jeep clutch.