i'm pretty sure you won't have to cut anything, i fit a cobra T-45 and didn't have to cut anything and the tail is about 5" longer than the GT one, the tranny itself is shorter tho
I got a t45 ....for 950 plus shiping and core shiping all ran me up to $1030....it come with a 3 year warranty and u can extend it
Got it from manualtransmissions.net
U call they build it dyno test it and ship it ..I should get it by today or tomorrow