i believe this might be what your looking for
http://www.hawksthirdgenparts.com/in...OD&ProdID=1929 it seems spohn makes driveshafts for any tranny for the f-body's, takes the headaches away, but with the cost of some of that green paper stuff that people carry in there wallets and pockets though.
Edit: you can take a th350 with a short tail shaft and it would fit right in there in place of the t-5 perfectly, but as you guys said before, you would still need the torque arm bracket, but for the driveshaft, use a short tail 350 turbo and your good to go!! and depending on the type of x-member you have, you could possibly use it aswell, but like in my case i couldnt, i have one of those kinds that are garbage, not even good with the tranny it came bolted to when it rolled off the aseembly line lol