I have the 3500 DRW Regular Cab 4 X 4 long bed, and the ride is great. The configuration of the rear suspension works fine both loaded and empty. That I have would be the same chassis and wheel base as a 3500 DRW QC short bed - 140. 5". And the QC short would carry more weight in front because of the larger cab. I would expect the ride to be even better. My GVWR is 12,000. Perhaps they assumed anyone who wants to carry 5,000+ in the bed would want an 8' bed to do it. Otherwise, I don't think the ride was the reason they are not making them.