gaucho919

Just bought a 91 comanche, pretty much the bare bones, no axles, no bed, no motor. Going to build it from the ground up, from mostly junkyard parts hopefully. The deal is I need to know what jeep I can get a motor from? The MJ had a 4.0/ax-15 combo. I've searched and apparently '91 was the oddball year, does that mean the only motors that will fit are '91 motors? would a motor from an auto XJ/ZJ work? Thanks -Sebastian