I am positive that the HCP works with the JR! I had this in my car and have done this in other cars. I will say though, I do not know if HCP has changed their design/fitment around since 2001 on their mount kits. Also, I would confirm the placement on the SI blower vs. the ITR blower.

I had a B18C block, B16a head and the ITR blower. You have to remove the 10mm nut that holds on the water/heater off. Then you need to bend the bracket down and out of the way of the blower. Possibly get longer hoses, but I cant remember. The MC is a close fit, but it fits fine. Also, the more boost you run the smaller the blower pulley and more room you will have. STill need to hammer the frame rail and cut the rear lip on the cross member. I can't remember what else, but I know it works.