well, you're very deep in "all motor" to turn around and slap a turbo kit on it.
now is the time to make a choice and go one way or the other....
all motor with putting the b20 bottom end on it- maybe see 20 hp gain, 40 tq tops (guessing here)
or sell all your cams and such, and get a turbo setup, and put 250 to the wheels for a lot of money.
i dunno... perosnally, i'd stick with the all motor route... you're 3/4 of the way there