I just recently purchased a new Ultra Frame Draw-Tite hitch for my F-250. It's a heavy beast but will set me a little more "at ease" pulling my equipment around without a weight-distribution setup. When trying to get the stock hitch off my truck, even my high capacity impact wrench won't budge the first bolt of eight. Does anyone know if there are locking pins or rings on the bolts at the top. Feeling with my hand up there, I can tell there's something in addition to just a nut and washer. It could just be one of those star washers but I can't see it up there on top of the frame. Also, does anyone see why I couldn't install the new hitch with the bolts hanging down and the nuts and washers on the bottom side? Not sure if it matters but it sure would make it easier to tighten and remove in the future (if I ever needed to).