After hearing how most here are having problem with 700's, I think I want to put the 400 that came with my 454 out a 1 ton truck. I had to buy a shaft for my 700R-4 in order for it to fit up, do I have to buy a shaft for the 400 to????? I know the tail shaft cover has to come off. If I did this would the transfer case have to be moved?? I know the 700 would fit without any mods to the transfer case, because it came with a overdrive when new. Its on my 82 GMC truck, I have a 350 trans in it now, but the case is cracked. It still runs and drives with the BB, but I know i'm gonna bust it soon.