Well to be honest, my wife bought one recently...
I already have a ford 4.9 and the thought of modifying the 4.9 to some degree has interested me. Ford for the most part used speed density (map) on the 4.9, there were a couple years (or california models) that used mass air but its not so easy to come by. So I put two and two together and thought, wonder if I could use the jeep efi with a chip, larger TB etc and come up with something a little more friendly when adding a little more cam than stock and port work....*cough*...turbo...a few of these have been done recently with good results on stock speed density systems, however there is a rich idle condition that isn't easily fixed, however the one mass air setup that I know of isn't experiencing this problem.
What interested me, is ford uses this giant plenum with long runners, yet jeep uses bascally a carb intake. Obviously this was done for a reason, the longer runners help the 4.9 build torque in a fullsize truck application and due to the light weight of the jeep, a short runner/small plenum was fine. I also thought, it would be no big deal to get a 4.9 carb intake and adapt this efi to it, as long as I could get it to compensate for the .9 liters, which shouldn't be too difficult.
I will more likely than not give up before anything materializes and slap a carb/intake on the 4.9...but thats life...I figured I would look into the possibilities though.
