Stock T-5 tranny question

[Coupe50h]

It'll hold, my friend has a 85 with an aftermarket trans, still it has lots of miles, it's a wc t5-z with 2.95 1st, and he launches at 4k on e.t. streets with a 400hp 347, the 2nd gr synchro is shot, and grinds pretty good, but it has survived more than i thought it would.....
if they break they break, sometime sthey go out on stangs that dont get raced, just never know, keep the fluid up in it, and launch it hard