I can vouch for the SBR 4000 kit, its a good deal and I miss that clutch, held up great and responded awesome to slipping the clutch off the line a little bit. Pedal effort is pretty good unless you haven't driven HD trucks or race clutches before. But what clutch doesn't get annoying in 10-20mph stop-and-go driving?
Had a mysterious problem with bell housing bolts disappearing and bye-bye clutch. I was going to buy just the pressure plate but I found a good overstock sale on clutch kits from one of our vendors.
Maybe next time.
