ive got 227RWKW out of my RB20, heres how i done it.
Haltech E6K. 2600 fitted and tuned
2nd hand T04, 1000 bucks
3 inch mandrel, 700.
Front mount cooler, i used a truck core cost me nothin but say 2000 for a schmik one.
Series 5 RX7 injectors 500, Bosch motorsports pump, 350
total $7150, if you had to add labour for the fitting of the turbo, pump and the injectors then $8000 would be getting close.
Its not cheap but the Results are worth it