Just swap out the guts in the 5speed and put them into your 6 speed case and keep 6th. I also talked to Jotech and he said for 900 plus shipping he will build you one that holds up to 398tq. That is not bad at all just find a spare tranny and ship it off to get it worked on. I did read a post that he did not tell what he did to it but as long as it holds up to 398tq I think most of us will be fine.