I doubt the W/D hitch is advisable for a C or any vehicle with a frame extension. That extension is the weak point, and the main reason, I believe, for C manufacturers downgrading, in some cases by a lot, the GCWR of the vehicle. Perhaps it would work as intended, but it naturally depends on how well the MH manufacturer has added on that extension. It would be nice if they could get the vehicle manufacturers to put out these vehicles with longer frames and eliminate the need for extensions.
I have a 97 24' Coachmen that had a 3,500# hitch when I bought it. I pulled that off and had a local metal fabrication shop build a custom hitch that ties into the main frame. As far as I'm concerned, that vehicle can tow up to it's GCWR.