A friend gave me the 8.8 that I have for free. I just modified it by shortening it. It's a 3.73 gear with LSD and disc brakes already. I don't have to touch it at all, the internals look good. I could have ran it without shortening it, but the perches would have to be moved and the 1/4 lips...
I haven't ran it yet, but I put a Ford 8.8 under my Scamp. The long side axle was cut down to match the short side and a second short axle used. I think I ended up cutting out 2 3/4" if my memory is correct. With the spring inboarded, it bolted right up without having to move the perches.
Besides my dad's side of the family being Dodge/Chrysler loyalists (not necessarily Mopar); one of my babysitters sons had a blue 1970-ish Roadrunner with a 440 in it that I fell in love with.