CarterKraft
personally i put airbags on every truck i tow with, never ever had a problem. i also have the sxs rack and a travel trailer when on vacaction.
but thought i'd mention.... see that contact pad for the top over load spring? I think you'd be better off and just as cheap to take that pad off and install a bumpstop with a single stud there so it engages that spring earlier in travel. i did it once on an f350 that i was towing with before the airbag kit showed up and it worked as i wanted and wasn't at all noticeable when unladed.
i just looked thu my amazon history, and i believe these are the ones i used. the truck i used them on was a srw cclb f350 '10.
edit* also just because i thought i'd share. i just got back from a trip with a buddy we went ~3000mi round trip. S Glamis, N Glamis, and Havasu. one sxs on the rack and one in the trailer. all of our sand tires and extra shit. towed with his truck an f450 6.7, 6-speed trans. fully deleted, i think he said the tune claimed +100hp over stock. we would've saved a bit on fuel if we would have used my 6.2 gasser. towing mostly at 67-70mph. we ended the trip at 6.9mpg on the dash. $2,135 in fuel for the truck (anouther $700 in 91 gas for the buggies) i think the low gearing of the 450 hurt the mpg. we got the same when towing his massive 3axle momentum fifth wheel that was much heavier.
my 6.2 gasser 4.3 gears, i tow the same setup, and its a tiny bit slower over all, 65-70mph, but it always claims 7.5-8mpg. and with gas being cheaper and all, i'm happy to stick with gas.