Love this build! Been following along since September but haven't commented yet - thanks for doing such a detailed build thread on your truck, it's quite well thought out and well executed. I picked up a 4.6 '03 Supercab FX4 last fall which I daily, camp, and hunt with, so have been super interested in your various mods.
In all my research I haven't seen anyone else in the 10th gen f150 community put so much effort into getting more flex out of their largely stock suspension set up. Have you needed to put longer brake lines on yet?
Did you have to trim anything in the rear of the truck to gain that 2" travel or was that just from fitting the Fox shocks? Would love to get some extra travel by bolting up something longer.
I hope you post up your final configuration once your satisfied with how everything is running
My plan is to add 1" block to the rear, crank the T bars to bring the front up 1" to maintain rake, install some fox 2.0 or Bilstein shocks, and run 255/80/17 tires on the factory alloys. Then play around with my bump and steering stops to get better performance out of the setup.
Overall I'm quite happy with the setup, I haven't dropped the front diff down yet as I haven't ran in to any issues thus far. The additional travel I'm the rear was from the longer travel shocks, other than the blocks the rear is stock.
Brake line lengths are stock as well, I checked at full flex and they have plenty of slack.
The only thing I may change, is putting the OEM sway bar back on in the front. Without it, towing is a little more 'busy' keeping it in the lane with a side wind.