The best advice that I can give you is to install the transmission and rear end, then measure to see what length you will need the driveshaft to be.
There are too many variables for anyone to know the answer to your question.
What is the ratio for 5th gear for your T-5?
With a 3.42 rear end gear, you won't be spending much time in 5th gear.unless you are running 25 inch tires.
I would recommend 3.73 or 4.10 with stock height tires.
