A couple years ago I was looking into doing the mopar Fuel injection for $2200 plus install. I went to a local jeep junk yard and bought a 98 4.0 with 50,000 miles on it and installed it for the same price. Why do all that work on a tired engine? I love my 4.0 lots more power and it runs at any angle. I did modify it to a 96 wiring harness and installed a old style fuel rail with the preasure regulator in the rail as I needed an external fuel pump.