make sure you get good belts. what kind of blower(paxton is the sister company of vortech) and make sure it lets the boost blow back through unless you have a bov, keeping the impellar speed reasonable will insure it doesnt come apart.........what kind of motor?

superchargers are a pain in the ass, but once its up and running its usually ok. getting all the bugs worked out is the hard part.
here are some of the mods I had to do (i'm fuel injected though):
areomotive1300 fuel pump
fuel lines 12 feed 10 return
modified fuel rail
injectors
3 different pressure regulators
fuel pressure guage
boost guage
timing retard module
mine had an intercooler with a stupid valve (it got removed)
mas air sensor

i still have to get rid of the rubber hoses that baloon up under boost. getting a bigger blower cause the belt slip is stopping my hp development, and its hard to tune properly when you get a different amount of boost every pull.