A must for high boost:
gsr block=>sleeving(boring if you like)=>low comp strocker kit=> MLS gaskek=>head studs=> =about 4grand with block dep on the labor.
=> for head: valvetrain kit, good as cams, fuel(RC is good), intake manifold and trottle body. =>2000-3000 (i paid 6bills for my 5 angle job and porting)
=> ECU!!! 200-300 don't even try to drive with out it. =>
=> plus turbo set itself about 2500 - 3000 for the good quality stuff.
=> plus some clutch, sensons, tunning, and so on..... this is pretty much basic and that's about 10 grand right there!!!! you don't have to go this fur unless you go with high boost. good luck on your project!!!