i put a g52 in my 80 toy. i used drive lines from an 84-88 the front worked but for the rear i had to move the axle back about an inch with a relocation plate (temp fix until duals go in and DL get shortend). as for the t-case im about 98% sure a top shift case will bolt to a forward shift tranny and work fine. some of the older t case inputs had strange splines towrd the back of the regular splines wich can just be ground down to fit.thats my