What Would I Need

What is your current comp. ratio? I assumed the engine is built. This may be a mistake. But if it is not, a set of low compresion forged pisons shoule be looked into. IMO, 8.5-1 max, low is better. (For the most part)

What would i need to do a Paxton blower on my car.
Paxton has kits that go from outta the box and on to the car complete. Use of the airbox is a good idea as to keep it simple. The extra cost is small @ around $500, or so bucks.

i have MP Chrome Box and Distributor, would i need all MSD Stuff?
I would go with the MSD (or equal) set up. It is actual easy to put togther.
What do i need for a carb?
A regular carb will work, but a blow through carb will really be a nice thing to have! If this will be "On the Cheap" as money will allow, then worry not and upgrade later.
Do you recommend a bonnet or the big box piece the carburetor goes inside?
Answered above. The box IMO isn't a bad thing.
Should i run Meth/water injection?
It may be needed like it or not. The more pressure introduced to the engine, the more of a need you'll have.

I'll let the been there done that fill you in.

i have a Mech. Fuel Pump now i am figuring ill probably need an electric one.
IMO, great idea.
Also how difficult is it to tune a blown carb motor? should i figure on putting in an A/F gauge?
I think a A/F gauge for any car and engine set up is a great idea and way to monitor the engine and it's running status. Tuning with one IMO is an excellent idea.
Sorry for all the questions, new to forced induction, any help would be great or some links to some build threads close to my situation.

Same boat here. I just try and make a list instead of a parrgraph of questions. :-D