On my 2006 Dodge RAM 2500 CTD I had too much sway loaded. First I tried Firestone Ride Rite airbags - big mistake (should have read the forum first). Then I installed a Big Wig Sway Bar (1-5/16" diameter) which helped but still was bad due to the "added" sway caused by the airbags (should have read the forum first). Then I installed lower Stableloads and fixed all of it. Wish I would have read the forums first. BTW they were the easiest (and cheapest) install out of all three.
Now all of that said -- if your 2016 RAM 3500 SRW is anything like my 2015 RAM 3500 SRW (I'm guessing it's identical), there's NO gap (or extremely small) between the overload spring and the regular spring pack. I don't know how I'd even get the lower Stableload to slide between the OL and the spring pack. Heck, there's not even enough room for the shaved down bolt head to fit in there. I'd call Torklift and ask them if they will fit or do any good on our late model RAM 3500 SRW trucks. I kept my SL's from my 2006 RAM but I can't see how they could fit (or do much good) on the 2015 RAM.