I'm assuming the "6" is for the 6-Cylinder....

For the 4.0L (6-Cyl):
Firing Order:
1-5-3-6-2-4
Cylinders:
(back of engine)
.........6
.........5
.........4
.........3
.........2
.........1
(front of engine)
Distributor:
.....(back)
.................(+)-screw
.....5.....3
1...............6
.....4......2
(+)-screw
......(front)

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