ok what is the pros and cons of having a turboed car water cooled(water-air) or air cooled(air-air duh)?

should i stick to the gsl-se diff with stronger axles or should i go with a toyota 4runner diff with stronger axles?

just to let you know i want to drift and road race, mild drag also...

with the gsl-se rear i was going to do the 5 lug conversion and ad a 300zx 2p caliper with drilled and slotted rotors, oh and a kaaz diff.

but with toyota i dnt knw what aftermarket diff to get and i dont know what aftermarket brakes i can put on it...