Why do you want to run one of those power robbing turbo 400 trannies in a Mopar?  Hmmm......I only know of 2 mopars that have done that swap. Both cars were big tyre chassis cars and they both improved ET with no other changes. But....was it down to a better converter.... or the more efficient 2-3 gear change All I know is a TH400 and a 9" are both considered options on my long term upgrade list  . The Reid case is another nice option you cant get for a 727. Indeed, the SFi case is another advantage. After reading another post on how some manufacturers are discontinuing parts for Dana 60's, I think fitting a 9" has moved to the short term upgrade list  I saw that too.  If money weren't an issue, I'd already have a glide in my car. Parts start getting scarce and I'll be ditching the Dana too. At this point in life, my car has become way less of a priority/moneypit to me. It is what it is. It'll run what it runs w/ what I have already.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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