rab475, Thanks for the info. I'm new to Jeeps and Mercedes engines. I am a diesel mechanic though and have done other swaps. You say the ax-15 is weak but there is an adapter for it and even the weaker ax-5 for the 4 cyl and most jeep swaps seem to be using the ax-15. If it is true about the ax-15 being weak then maybe the are using them since they already have them.
For me the swap will be for driving and off-road when needed. I'm not that hard on a vehicle. I wont be racing or doing burnouts or rock crawling. I'm building a two tank WMO fuel system to drive cheaply. Gearing will be important for me and tire size to keep the engine in it's power curve. For now I found a 89 wrangler with a 6cyl and automatic. My main goal is to complete the swap and drive then later swap the auto for a reliable 5 speed then do a little body work. It has some rust but nothing I can't fix.
There are several 617's in wranglers without a lift and weird angle. Some have said a lift would be nice to give additional clearance but not totally necessary. Mine will have a 4 inch lift with hopefully 31x10.5x15 with no rubbing.