What would be the cheapest and easiest way to swap in a 4L80E tranny and case. So far it looks like I would have to buy the seperate controller. Is it true you could build one to be shifted manually. I've got a 700R4 and 208 and I know that they will not stand up to my new engine. I've thought about a T400 and 205, but I like the lower first and OD of the 4L80E. This is going into an 85. Any suggestions would be appreciated.