Yeah, I learned quickly how much better coils are over leaf springs (and how much smoother of a ride it is).
The frame is the exact same size as the original 2A one. My wheels are off a later CJ, so the offset is different. I'm still running the stock D25 and D41 axles. I probably should have upgraded, but they are just fine. I really don't beat on it.
Actually it is more stable than the leaf springs. There are a couple spots that were a little sketchy before (tipping wise) and now it doesn't even feel like it want to flop. I think it has to do with this setup being softer so the axles will flex taking up the grade of a hill.