New here. I have a rare set up with a 4speed 165 mated to a Dana 20. It appears to be original as the cross member and hump does not look modified. They are a leaking mess so i need to do something. I have a th350 but I don't think there is a way to mate to the Dana. If I buy a 205 will the cross member / shafts need to be modified? Should I just find a 700r4 with tcase from the junkyard? Has anyone done this and how big of a job is it? Any suggestions? Thanks.