It is a t-case tail shaft conversion. The t-case out put yoke slides now, if you convert it then your yoke will stay in one place and the drive shaft slides. My jeep has been converted, I use a double cv drive shaft.
i will consider this. i haven't seen signs of catastrophic failure, but something will need to be done if i do any more suspension work. i will watch for examples this season and do some googleweb.
"planning" the start of my season next month.