Malicious Intent

I am actually going to be doing the exact same thing with my z32. We have 4.10 gears in the rear, so I would personally like the t56 for that extra gear. But they are a pretty penny, so I am also considering just trying to mate the current 5-speed to the 350. But I hear there's actually quite a bit that goes into that, and if anything is off even slightly it could go badly. Now if you are wanting to make a monster machine out of this I would be skeptical about the t5. From what I hear (I have never owned one so this is just what I have heard around) the t5's will buckle under even mild builds. I believe I read somewhere that they are only rated to a MAX of 300 ft/lbs tq. Now if you are just building it to be a quick daily driver, then it should be fine. But I hear the t56 is good up to 400-450 ft/lbs tq, so if you are looking at power then that's what I would go with. I'm not too sure what our 5-speeds are capable of, but I'm sure a little searching around can give you an idea. What are your plans for your 350?