I don't remember how much to shorten the driveshaft, I know that mine was over the 2" mark with an 8.5 rearend, but I can tell you that the 200r4 crossmember (I had an iceman) worked, but the mounting hole had to be cut and lengthened, and after I did it, the transmission didn't sit quite right, had a really odd angle. Good luck!

I remember the days that cars were lowered and trucks were lifted