Supercharging ?

[arrowem]

Hi, I figured of all the forums I frequent, this is THE place for a supercharging question. I am new to the concept of supercharging MY engine. I was formulating a build and then just when I was about to pull the trigger...BAM, someone came out with an elegant way (kit) to add a supercharger to an old pontiac engine and keep it under the hood...SOLD!!!!
Just an update- It will be a '68 468ci Pontiac block, aluminum heads, carburated. I am planing on a D1SC.

Now my questions.
1) Due to the price of the units themselves, I have been looking on ebay. Is a D1SC that came in a Mustang kit the same as if I bought one off the shelf? I know the brackets and some of the piping would be tossed but I would think I could reuse some parts.

2) Is there a simple diagram of supercharger plumbing? Like where does all that piping go into and out of?

3) If adding an intercooler, are they universal? The guy who builds the kits told me they are a $1800 add on, but I see them on ebay for $100-200.

4) Where does the intercooler fit in to the plumbing scheme?

Thanks, Jason