Could you help us understand the rationale behind the hitch being rated to tow 500 pounds? I've never heard of such a rating on anything bigger than a Subaru :) For such a capable frame as the F550, with the torque it has, even if you planned to never tow, why not install a standard hitch with a 10k limit from the beginning?
The ad says the bumpers are winch ready - why aren't there winches alreqady installed?