i HEAR its pretty difficult. also, the price of the kit and time for an amatuer (not calling you an amatuer) to install isnt worth it. tranny shops get the parts much cheaper and can install quickly at a good price. i have looed into this a lot.
1st t-5 i had. replaced 2nd gear, checked everything else, installed new syncrodes and a couple other little things $320
2nd t-5- blown 2nd, and 4th, wanted to charge $400. parts alone out of a catologe cost $300
the one i have now just needs new syncrodes and will cost roughly $200-250. i have gotten MANY quotes
t-5's = sh!t. if you have the money to get something else, don;t waste your time.