Glad you got it sorted out but I don't understand how the lift induced a hard pull while braking.
Yep - this may not be the most accurate explanation, but imagine if your steering linkage is loose, which it was, first off my steering was all over the place... wandering, sloppy etc... now you hit your brakes and the front end flexes and drops downward.... I'm visualizing that what ever side the linkage was leaning to begin with results in a pull to that side because of the extra weight and force being applied to the front suspension while braking (again... my speculation here). The shop said they have seen it happen before. They checked all my brakes too and said my brake job is solid.
Also... the new lift kit came with MUCH better brake line extensions. I'm not sure if that made a difference also or was adding to the problem, but the rough country kit is total ****. The brake line extensions did not really drop them down enough and one side was on a forced U shape. The whole kit was just junk in comparison to the BDS kit... in the front and back also, all the brake lines and ABS lines were just mounted loose not using any of the factory clips or replacements to make them mount back to the factory locations. The new kit has adapters and mounting points for everything.
I wish I had comparison pictures of what the front suspension looks like before and after also... If you could see the difference in angles of everything. The rough country kit drop brackets were complete crap... everything on the BDS has nice shallow geometry.
Also a nice benefit, the BDS kit had some "add a leaf" options for towing. I tow a heavy *** 5th wheel. I really needed a thicker leaf pack to do it right. So now I have a 5 leaf pack, which is the equivalent of Fords camper package, minus the overload spring, and I have my airbags for overload. Essentially the rear suspension is like a 1 Ton now. Its just pure awesome-ness... very happy.
For google searches...
rough country super duty kits are junk
rough country F-250 F-350 kits are junk...
Rough country ford super duty F-250 F-350 DO NOT BUY!!!
Rough Country JUNK!!!