quick ? on trannies

[LuKsEaZy]

I am kinda new to the 240's....i actually own a 350z....I am looking into getting a 240 I just can't figure out which one i want...I am really considering a 91 with the SR20det red top....but i read on the board you could possibly put a 350z 6spd tranny on this motor (correct me if i am wrong)..

I have 2 350z trannies lying around with 3rd gear gone...i was going to replace them....I actually work in a parts dept at a nissan dealership...so i can get the parts for cheap...

Any suggestions on this

thanks Jonathan