You'll need oil feed and return with appropriate fittings, hot side piping, cold side piping, post compressor piping (downpiping), boost referenced fuel pump (if planning more than 5-6psi boost). Best to get a Wideband for tuning, Boost/Vacuum Gauge, Oil PSI gauge, and Fuel PSI gauge.
You CAN use the stock intake/exhaust manifolds if you're crafty with porting/milling. There is a video on Youtube of a guy with a boosted inline running stock EVERYTHING in his ratrod. He ended up burning the seals on his compressor before the motor went, so it is possible.
I'm in the process of boosting my 250 going for the cheapest setup possible. I have maybe $750 into it and I still need my coldside and downpiping, which would tack on another $75-100.
You'll need a welder, a way to cut steel pipe, sockets and wrenches (9/16", 1/2"), hammer, screwdrivers, wiring crimps and strippers.
Also, a general know-how of how turbochargers work is great to have.
