I have a 12v with a 47RE I used my ford NP273 transfer case and I did not have to cut my drive shafts. I did have to replace the input shaft in my t-case and fabricate a mounting plate for the tranny to attach to the ford x-member but the rest worked like a champ. Also the t-case is clocked a tad bit more than factory so you might have to do a little modification to the x-member for the front drive shaft, I havent put the front shaft on yet just rolln 2wd until I work out all the bugs. I got all of my conversion parts from GOS, great guys and lots of help:thumbsup:thumbsup.