well I guess I stuck my foot in my mouth, turns out the one guy had hydrolocked his and bent a rod. He just used all the internals in his original block and the other guy sent me this message on facebook "Hey man! No, it required some machining to make work. Some of the engine mounts are different. The rough bosses were there, but needed to be milled flat, drilled & tapped. The dipstick hole is also in a different spot. There was one other hole that needed to be tapped or something....can’t remember. I ultimately used another JK 3.8."
so Sorry to get your hopes up, I was under the impression that they both had made it work.
personally my 3.8 is tired and I'm gathering parts to do a L83/8L90 swap