GT3271 appears to be a good choice

[Z31SPL]

But does it have hookups for water or no. I would assume it doesnt

[2+2turbo]

i doubt it , in the description given by garret (on the link above) its specifically says "oil cooled" , meaning it has no passages for water, wgen they are oil cooled and lubricated the use more of the cartridge for oil capacity compared the water cooled turbos where oil is just a couple of passages to the bearings for lubrication , and the rest of the cartridge is filled with water ... get what im saying? 8)

[Az4u2c]

I hate to say this because it's a little off topic, but Dino, did you ever find a taller rear end unit or maybe some aftermarket gears for 5th gear?