Oh, trust me I know how great the army pay isnt, trust me. 9 years later, still wishing it paid more. The TBE you got picked isnt bad. The only small issue you could run into is the piece in the middle; the "divorced" wastegate section. IT doesnt always fit with some turbos, all you would have to do is trim or grind it down some. Other than that you should be alrite, after that and some sort of tune or engine management.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX