Update on the tires. I checked clearance, and they surprisingly fit pretty well everywhere except on the KDSS sway bar on the front driver's wheel well. The issue is as much about overall diameter as much as it is width, and the rubbing is significant enough when turning right that it will literally bring the truck to a stop at ~1.25 turns. I had to ask myself what the point of the "upgrade" is by moving up in size, and the pros list is a lot shorter than the cons list. The truck was already dialed in perfectly with the 34s, and I feel like I'd be chasing solutions for the problems 35s creates for basically a half inch of ground clearance. I could add spacers, bump stops, KDSS relocation, trim plastic, etc., etc., but it seems silly to add the complexity and expense when the easy solution is to just go back to the 34s. I only put 3 miles on the tires, and the tire shop was more than willing to let me exchange the tires for new 285/70/18 Ridge Grapplers. I probably could have just returned them, but I don't want to be a PITA customer and who doesn't like new rubber?!
Here are some pics of the clearance if anyone is considering running this tire. I'm sure it's doable, but there will be compromises made in order to get it to work at its full potential. I stand by my original decision that the 285/70/18 is the best size tire for this platform, and fortunately I was able to correct my mistake before going down the rabbit hole

I will admit the 35s look incredible, but people like
@Willy beamin were correct in calling me out for going against the original ethos of my build.
A couple of big pieces of wood and 4 Maxtrax stacked to see how the front passenger tire would clear (~13" off the ground). Doesn't appear that it would have any issues, but trimming the plastic the rear would likely be necessary for real world wheeling situations.
Rear driver tire - no problems, but I'd likely replace the ARB mud flap bolts with more flush allen bolts to keep the tires from getting damaged under flex.
Here is the real problem. You can see how much it rubs even without turning the wheel to full lock. Couple potential solutions like alignment, wheels, spacers, KDSS relocation, etc. but IMO they all compromise something somewhere else. I had the KDSS relocation on my 2014 truck and wasn't a huge fan of it, and it looked like the bushings were put under a ton of strain with it on.
No body mount or frame interference, but keep in mind this is static/not moving.
Passenger front BARELY touches the sway bar, but it's not enough to cause any real issues IMO.