So I bought one of the 15% pulleys from Marshall (Global Motorwerks) and installed it Saturday night with a buddy. It took about 3.5 hours. Install went real smoothly except for a brittle coolant T for the overflow tank that crumbled. Being that all the stores were closed we cut some pipe and improvised until I could fix it on Sunday. I also found that my passenger motor mount is torn which explains the clunking I've been trying to track down. The pulley is great. I think if I had to do it again I could knock it out in 1.5 hours if there weren't any surprises. The ALTA pulley removal tool worked great. Just thought I'd share my experience.
On another note, is anyone in the area running a water/meth set up?