What can I use. Currently my Jimmy has a Th350 to np203 on stock axles. I am inches from buying a ford dana 60 though and I have no idea how I can get it to work while I save for a doubler kit. Is there a ford transfer case that will bolt up to my th350 and be on the drivers side so I can have 4WD? I realize I could buy a Th400, but I don't want one and I want to use my 203 when I get a doubler kit.