i run a 12" reman from carquest, cost me $68. its the diaphram type also. this clutch has held up thew a ton of beating and it still is like brand new.
filled it up with mud 3 times so much that it wouln't move, it started smoking the first time because i didn't realize it was slipping. a hour with a hose under the truck and its good as new.
the hydro and linkage makes no difference on the clutch it self. as far as the lever type, it is harder on your leg and after some time will chatter. i like the daiphram alot more, the only down side to it is with high rpm the pressure plate likes to flatten out causing less pressure on the disk allowing it to slip. centerforce has weights on their pressure plate that stops this.