Kenny, i dont think the driveshafts are a different length. I am pretty sure that difference is taken up in the spacer plate between the transmission and transfercase. Warren, I am doing just that with mine at the end of the summer, but I am also dropping in 4:10 gears. the 700R4-3.08 combo is a setup for disaster with the 700R4. Unless you live in totally flat land that is... The ideal combo would be to put 3.42 or 3.73 gears in, but I already have my set of 4.10's which is why I have chosen them. When done, I will also have lockers front and rear.... I should be able to go just about anywhere!!!