Just my opinion...stay away from the switch pitch set up. I hated it. If your going to go 400, just go with a t-brake and "normal" converter. As for the rpm look for a big increase on the highway. can you say... last resort?
Although, I shouldn`t talk. I am going 400 w/ a brake.To end my trans nightmares.(if my fresh 200 fails, I`ll keep my fingers crossed)
Brian