so i have an 89 eliminator comanche 4 lt with a 5 spd thats a 2x4 that i want to convert to a 4x4 but i want to put 91 and newer running gear in it. i dont know if theres a difference in bellhousings is different between the ax-5 and ax-15 bellhousing? and or can i still use the tranny thats in it already?, also are the tcases different splines in the 91 and newer and 90 and older? where do i find leafs for the rear for lift or just use the stock ones, how much longer are the springs than the xj's? give your thoughts please much appreciated