Wow! Time for a 4.0 probably. I'd think I'd want to pop the head and see what's in there tbh.
That's my plan for tomorrow. I have a bad back, so I got an engine hoist to pull the head. If the block is borked, I may go for a 4.0L swap. I need to do more research. One of the reasons I would do it would be to get the transmission with overdrive as well as a modern transfer case. I would run a carb on it, because I dunno how well the ECU would work, the early 90s was smack dab in the capacitor plague. Even high quality ones were garbage. They leak all over the board and nuke it.