ive got a turbonetics evolution w/g fitted , but then im also run a t34 at 1.5 bar with a screamer pipe(wg pipe is just below the radiator) sounds awesome when wasting.

for starters , you need a external wg and a place to plumb it to , dont think it can be done on the std manifold. my cast manifold has a flange for it , you may need to get a custom manifold fabricated.

external wg's make in car boost control easier , but only become useful with big turbos with high boost