well, i would ask him if he is gonna sell the injectors too. anyway, you will probably need to go with a bigger topmount, a new fuel pump(not very expensive) and either a boost controller or just the solenoid that Faded mentioned. then a kick ass tune. Your power gain should be very efficient. dont quote me, but ive heard some getting a good 300 or so with the set up.

vf39(hopefully with injectors): 400
Topmount: (used) 4-500
Fuel Pump(255lph): 83.99 shipped haha
Perrin boost solenoid: 80-100 (depending where you buy it)
Tune: (initial)850, (if tuned already) 150/hr

Total: depending on your route will be from 1000-2000. not bad.