I didn’t see a steering box brace in your photos, get one if you don’t have one allready (ORD). The stock steering is fore and aft strain on the frame, as soon as you go crossover it is side to side and will crack out your frame near the box in short order without one.
You can unbolt the steering arm from the drivers side knuckle, and unbolt the steering box. Then remove the whole mess as one assembly including the drag link without breaking it down. Take the kingpin spring cap from your passenger side and install it on your drivers side. That will leave the passenger side prepped for your New arm.
The tie rod ends on your old tie rod won’t be reused so I wouldn’t be afraid to use a hammer blow on the side of the knuckle casting where the tapered tie rod hole is followed by beating out the tie rod with a sharp hammer blow. By all means use an air hammer with a fork, or a fork if you have said technology.
If for some reason you need or choose to replace the upper tapered king pin you will need a 7/8” Allen key that can withstand a LOT of torque. I think the spec is 550ftlb, so removing them can be brutal.
I think the nut that secures the pitman on the sector shaft is 1 5/16”. That is kind of an odd size so you may want to check your sockets.
Other than that just a good torque wrench and some time. Be prepared to do a bit of a DIY allignment to get it close.