O.k here is my dillema. I've got a 79 Toy 4x4.I just had my 4spd rebuilt by marlin last christmas. I want to run Dual cases but I think I have to have a newer 5spd trans and transfer correct.? I don't necesarily want to replace my 4 spd, because it is holding up really well. Is there any way to do this? I was thinking about just putting the 4to1 gear set in it. Then when I do get around to buying the 5spd I could put the 4-1 case in the rear. will this work? My other question is that I was thinking of replacing my crossmember with Allpro's dual cross member. Does anyone know if I can use this crossmember with a single t-case attached for the time being? Thanks for the help.