1. You cant use a power steering box without the pump and reservoir. It would be harder to steer than a manual box.
2. Power steering box from a TJ isn't compatible with a YJ.
3. They didn't make a TJ with manual steering. So, no.
4. A complete list of parts would be...pump/reservoir and brackets to hold it on the motor, new belts for the motor, power steering lines to the box, power steering box, new pitman arm, new sector shaft from firewall to steering box. And I believe the drag link from the pitman arm to the tie rod is different as well.
A manual steering box is few and far between anymore, might be an "impossible" find in a salvage yard.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...