I turned down several new 450s that did not have the puck system from the factory--I would keep looking until I found a 3500 already equipped. Altho, a competent hitch installer can probably make it look factory.
Could not figure WHY Ford would not think someone buying a 450 would not be interested in towing, thus putting a puck system in every new one...
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired