in theory you can use the peugeot crossmember with an AX-15 mount, move it back to the new holes, and use a 1" t-case drop to accommodate the height difference.
this page has a good writeup on it. hopefully the link works.
quick summary, very few Jeeps were ever shipped this way because it was expensive and time consuming. and they were never offered to civilians this way.
https://www.facebook.com/MudPuppyJeepers/posts/jeeps-in-a-box-for-50-this-is-one-of-the-oldest-urban-legends-out-there-its-been/979649385440306/
well, it certainly would freak me out, because that's more myth these days than anything else. I hate to burst your bubble, but that "kit" was put together by a company (omix ida?). very cool none the less.
lemme find a link...
that's one thing I've so far resisted adding to the KJ's collection. maybe once I build a real roof basket I'll run out of reasons to not install mine.
I found the shop that shortened mine by typing "4x4 shop" into google maps. found there's a place just a couple miles away that I had no idea existed. it cost me $30 but that doesn't seem to be typical.
stop everything. right now. go back to the store and buy grade 8 cap head bolts. right now. do it. carriage bolts are not made to the same sheer strengths (maybe grade 3?). I would rather have slop in the axle hole, than snap off the bolt head.
the hardest parts of the swap are the seatbelt differences and the fact that most MJs with a bench didn't have headrests. Be very picky and get a late model that has headrests. or better yet, the link in my signature has a thread about using the late 90s dakota bench which is way more comfortable. but requires more effort to install