Centerforce Duel Friction Clutch

I have a 10.5 inch Centerforce Dual Friction in my 65 Barracuda. The stock assist spring was too heavy for a diaphragm clutch; I replaced it with a lighter spring and it's just right now. Don't ask me what that spring came out of; I just found it in my stash of miscellaneous parts.

I'm probably not real up to date about what's available, but a stock replacement 340 clutch would invariably slip when speed-shifting, while the Zoom street/strip clutches I ran next didn't slip (until they wore out) but they were left knee killers and didn't last all that long, either.

I don't speed shift anymore because the Centerforce does have a really harsh engagement if you do, but it has lasted longer than any other clutch I've had in the car since I put a 340 in it back in the spring of 1973.