[twindman]

My Mountaineer has one of the lowest pin weights listed from Keystone. It is 2055 lb. That is empty. Loaded somewhat it is actually 2400-2500 lb. Many people use 30% of gross weight, tho mine is much lower than this. I think my old 2004 Silverado had a gvwr of 9200, so not much load. My 2012 gvwr is 10,000 lb. So the old trucks may not work for you.