The P1sc or D1SC will fit in there fine. I have inquired about them, and got the free literature on them from ATI. It includes diagrams detailing their measurements.
From all the ones Iv'e taken on my truck, it will fit no problem.
BUT, they do require you to relocate your power steering pump. Essentially, lowering it down some. On my truck, as well as my other buddies V8 s-10 blazer, that would push the PS pump into the steering box.
From all the measurements I"ve taken, you wont' be able to run ps in the stock location with their carbed blower brackets. Thats with the stock v belt set up, since thats what the procharged kit was designed around.
Heres a truck with one.
http://www.turboconnection.com/showcase/s10/
I've talked with a guy from the s10 V8 forum, and he claims that the procharger kit for the TPI camaros will fit a V8 s10 with the tpi accessories. He has one on his camaro, and claims he didn't have to change any of the accessories, and it just mounts outward of the alt (on the left side of the truck, in front of the master cylinder.
But, I don't have any measurements for the camaro one. They dont include them with the TPI info, since it was made to fit specifically the camaro.