Thanks Transman, I was hoping you would chime in.

I Knew I had read something about it had changed. I have a 518 I bought directly from Mopar Performance in 1994. It is a non lockup trans. I am guessing it is probably an early run trans. Will the new seat interchange? Is the bearing itself the same?

If you don't mind me picking your brain sir, how would you build these trannys if they were going into your own ride? I plan to get the sonnax kit to make them oil in park. I have read something about drilling the output shaft to get more oil to the o/d unit?
What a/m parts or upgrades would you recommend?