Is there any place out there that makes a rebuild kit for a T5 that'll handle the power of a nicely modded 350? I tried google and came up with nothing.

from what i have heard is that the weak point on the t5 is that the case will streach allowing slop in the gears with to much power and this will allow binding. every one i have heard of or seen in real life either got an aftermarket trans or a T56 from a early 4thgen.

Hanlon Motorsports sells a rebuild kit with upgraded parts as well as some other good additions to think about.

http://www.hanlonmotorsports.com