If you dont mind spending the money, Id say do a B18B swap and get a Drag Turbo kit.. This will give you great power to start with, then you can build your internals turn up the boost and make even more power. If your serious about GO then I suggest you look at the Turbo for sure. Do some 2.25 or 2.5 inch exhaust, clutch, fuel, ignition, some Dyno time, Gauges, etc..
Thats my .02c anyway..