Achieving level tow with Ram 3500

Thanks for replies. I like the B&W BWRVK3600 hitch but lowest it will go is 17". Reese 30160 will go down to 15.75" and appears this will leave 6" clearance so may go with it. But if no squat we'll still have RV nose up about 6". Primetime says with RV level, nose to ground is 59.375". My ruler shows top of tail gate at 58". This leaves only 1.375" inch clearance btw tailgate/bed rails and RV nose with RV and TV level. Looks like best we can do is nose up about 4.5 inches unless we eat into the 6" clearance. Did I miss something????

Thanks again

Marv