well you can buy complete kits. from D&D for like $2800.
that comes with crossmember and aluminum driveshaft. say's everting to complete the swap.
I assume you could cut that cost by modifing you existing driveshaft. finding the tranny a cheap as possible somewhere and then I belive the crossmember is just an 03 cobra crossmember.
http://www.ddperformance.com/T56 Kits.htm
here is there page. I would call them and pick there brain even if you want to go cheaper.
the t-56 I have used on the gm side of things have a solinoid driven reverse lockout. so you would have to deal with this as well possibly but i am not possitive.
I just know on the 97 f-body t-56 I put in my chevelle the was a skip shift solinoid from the factory and a reverse lockout solinoid. not sure if the ford models have these or not.