I know it's not drop-in but there should be a boatload of Chrysler engines that match that tranny... all because of way back when they started putting both Chrysler and DSM v6s in the same Caravans on the same transmission. I think even Pentastars share the bolt pattern and zero miles pulls (from people doing big block conversions on Wranglers and Rams) are available relatively cheap, like under 2k with everything (manifolds, belt accessories, the whole pull) .

Yeah that's money I know <img src="/forums/images/graemlins/frown.gif" alt="" /> Just mentioning a possibility. Even EGE 3.5's from old 90s Intrepids and stuff are pretty decent SOHC non-interference reliable engines that should bolt up without too big a battle.