first step is to get the wallet ready cause u gotta pay to play! r u on much of a budget? bolt on parts or is the engine comin apart?
next perform spring cleaning: The Grand National / T-Type / Turbo Regal Buick Spring Cleaning Guide
some good things to start out part wise would be supporting mods:
340 fp, hotwire kit for pump, larger injectors(60lbs. r a good one), and adj. fp regulator.
next, things like alcohol injection, turbotweak chip to match, sticky tires(Mickey Thom.), better intercooler, turbo in the 61 to 6776 range, i use q boost controller to adjust my boost pressure, larger downpipe... and the list goes on!!! if u want more i can give u more im sure but those parts should do pretty well!