Yeah, depending on your truck's history, the frame ends may have been through some rough spells. These get straightened out, but until you try to hang a winch between them, it's hard to say if they're exactly straight and parallel with each other. A punch can be used through the various bolt holes to shift things into position. Sometimes a bit more is needed, but if you have a BFH, maybe a brass drift, and a good eye, the solution can be achieved quickly. It's not a big deal , just be careful of those fingers. Any one may not be your favorite, but I'm sure it's in the Top 10...
Pic of where you're at with the bumper removed.
The frame horns are still on here. IIRC, these come off and the ARB bolts the the squared end of the frame rails.
Now, most of us have a heavy winch in the mix, so you either need beefy help or a solution. However, if you;'re physically challenged in some way (My back is crunchy) then I used a rig I put together from various 2x scrap. It set on the jack, so worked but not OSHA approved, be careful, but it works well no matter how much you bumper weighs.
For those lights, lots of options. At it's simplest, this is a very basic mod. You should have the skills to do it in the field as an emergency repair. Do one then test it to build confience. Just splicing two wires on the pigtails is all IIRC, the thing is to properly splice them with the right materials. The leftovers can go in you emergency repair kit (vinyl tape, splice connectors, waterproof connectors, spare wire, etc.