I'll save you some work, the rear of the darts is 3 bolts for the wheel bearing and all the conversion kits ive seen have been 4 bolts, i havent found any rear LCA that look remotely like a dart that have drum in hat design. It got to the point i got frustrated with the idea and stopped looking. the bolting of the backing plate with only 3 bolts seems to be a hold up. I could only imagine what a custom fab job would take.Hmm. yes, the Neon used drum-in-hat rotors. I haven't given it a lot of thought. I think I'd have to look backwards in Fiat parts bins to see what they've done. Trying to merge something like the Neon's setup would be more work than it's worth. FCA really did some... interesting things designing the Dart. They looked a lot more in Italy's parts bins and designs than they did Chrysler's.
I concur tat the effort to do outweighs the benefits. But if it could be done?!