These are auto boxes for non-turbo engines. I have one, but I'm using it for the final drive gears only.........the rest is junk. They are weaker than the W4A33 boxes, that's why we don't used them for anything except the gears.
You might get lucky for a while and have it hold together, but there is a reason the turbo models run the 33.
What are your plans for the car power wise? Are you planning on running a stock 4g63t or boosting your 4g64?
I'd be content with 200-300 HP (That's a big range, I know) Is it more economical boost the 64 or just go for a 63t swap? Either way it sounds like I'd need a new tranny to handle the power, right?