I installed my SCer at 40,000 miles and am now at nearly 80,000 with zero problems from it. However just to let you know... if you ever have to change the belt it will be a pain. I think you will actually have to remove the SCer bracketry but I haven't had to do it yet, maybe there is a shortcut (maybe rotating the bracket that holds the cone) but without me doing it before I am unsure on everything it entails.
And that looks to be a great deal!!!!
2001 Ironman Daily Driver... 3.5" suspension lift (OME912 springs and 1" spring spacer), ball joint flip, 1.5" front diff. drop, 33"x12.5 TrXus MT, 16x10 Eagle Alloy rims, Interceptor, PV muffler, K&N air filter, Alpine Supercharger, Bilstein shocks, and some trimming.
2000 Ironman Project LS-1 VX... very slow progress but someday....... ohhhhh someday......