1. Seat Brackets: The seat brackets from the Cherokee will not match up with the YJ's mounting points. You will need to purchase YJ-specific seat brackets or modify your existing Cherokee seat brackets.
2. Seatbelts: The seatbelts in the Cherokee may not be compatible with the YJ's seatbelt mounting points. You may need to purchase YJ-specific seatbelts or modify your existing Cherokee seatbelts.
3. Recliner Mechanism: The Cherokee and YJ have different reclining mechanisms. You may need to modify the Cherokee's reclining mechanism or install an aftermarket reclining mechanism in your YJ to get the desired seating position.
4. Rails and Sliders: The rails and sliders from the Cherokee may not match up with the YJ's seat mounts. You may need to purchase YJ-specific rails and sliders or modify your existing Cherokee rails and sliders.
Once these modifications have been made, the Cherokee seat should fit properly in the Jeep YJ.