Yeah I agree don’t go throwing the baby out with the bathwater just yet. These things have known issues with sloppy steering. Visually inspect like Bent advised. Get under it as your boy cranks the wheel side to side.
Slip can be found starting at the rag joint on the input side of the box. The gearbox may not be bolted tight to the frame and or the frame is cracked around the three mount points for the box. This is very common with age and a lift and larger than stock tires. You’ll see the frame and or box flexing before the wheels start to turn.
Steering drag link ends can be worn out as well as the tie rod ends. Your ball joints on the knuckles could be loose too.
The gearbox itself could be worn out which will come with loose/wander type feel.
Last up is worn leaf spring bushings. This will allow the springs to squirm side to side with steering input.
You could have one thing or any combination of the above that gives a loose feeling to the entire system. Converting to crossover if the other items are still wiped out will keep your problem front and center and have you really scratching your head.
Keep this in mind all of those issues are totally fixable, even a cracked frame. ORD has an excellent brace to support the steering box and does also sell a weld in plate kit to fix and strengthen the frame in that area. The rag joint was a horrible design right out of the gate and can be fixed by swapping in an intermediate shaft from a ‘95 or earlier jeep cherokee (xj). There are multiple threads on how to make the switch.
The rest are basic stock replacement parts if you find anything worn. Ball joints, rod ends and bushings.
Keep this in mind that truck is 25 years old. It’s a leaf spring truck so even when new they weren’t sports cars, but they shouldn’t be loose. Add in a lift and larger tires and stuff sees a little more abuse. I would not be surprised in the least if you have to rebuild the front end just from the age/miles. Look it over thoroughly and if you are unsure take video and post it up. We’ve all been through it here.
Welcome to the sickness.