if you want an all out fast car in the end, the l36 mods you can do will just surplus your turbo later. if you just want a car thats quick, not fast then an m90 swap would be your best bet, but then all the n/a mods would be useless unless you went as far as a cam and heads.

just think about what you really want to do with it before you start throwing money around.

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98 XGT - 3.2/3.4, s&s, ported m90, ported tb, 1.9s, jp dbl; tinted, blacked out, lowered
soon -> e85 and a lot smaller pulley