http://roughcountry.com/install/145S.pdf
That was all from their web site on the instructions and it shouldnt affect your drive shaft angles except make it better. I know when I droped mine it helped my front drive shaft somewhat anyway because the cv u-joint part was hitting the crossmember, so I put three washers on both bolts of trans/tcase mount to raise it a little and it worked no more rubbing. But in youre case you may need to get drive shafts made.