I believe there are 3 different (could be wrong) flexplates for the 4.0L
87-90/91 renix style motors (60 notches)
90/91-95 pre ODB-II motors (12 notches)
96-01 OBD-II motors (12 notches)
One flywheel will have 60 notches and the other will have 12 notches
You will need to get one with the...