1. a D1sc is a D1sc. if you have any doubts you can allways call procharger with a serial #.
2. Piping is from blower to carb. The blow off type race valve goes in the pipe in between.
3. Do not buy a $100 intercooler off e-bay. They have to be sized for your application or they are a waste or a restriction. Procharger makes good intercoolers and so does Bell. (lots of others as well) Poor intercoolers even come apart under boost at times.
http://www.procharger.com/intercooled.shtml
4. blower - intercooler - carb and usually the valve between the carb and intercooler
you need a special blow through carb
http://www.procharger.com/bebs.shtml
There are drawings and lots of tech info on the procharger site
These guys do prochargers on pontiac engines, and I'm sure there are others. There are pics of installed kits on there site.
http://www.angelfire.com/fl4/pontiac...chineshop.html
I love boost!