You're limited to what you can put behind the 392 without some sort of adapter.
Only trucks had the electronics. If you stick with a car one you'll have hydraulic lockup.
904s are not a weak point in most drivetrains if built with even minor upgrades. Also most cars that are swapped from a 727 to a low geared 904 are very noticeably quicker, I would not hesitate one bit for most cars to swap in a 904.
I've killed many 904s over the years all with 360 daily drivers. There used to be a picture here of a wrecked 904 with the parts comparison between a 727 for the weak points. I definitely wouldn't want to run one in what he has myself, I like reliability
