My x ambulance E350 has a 42' frame width. The guy at the welding shop thought 38 was standard for most trucks of that era. I have looked around at bolt on receiver hitches and most say they will fit a 95 E350 but I don't know if they will bolt up to the wider frame. Most don't give dimensions in online adds and I have no confidence in the guy at Farm and Fleet. Any advice is appreciated. I really need a hitch.