I don't know about the 360, but the Ford 460 mileage chart looks something like this:Actually with my 1981, my Ford and Chevy friends didn't believe me that I was getting 15MPG Imperial with it. Then they went with me on a 500 mile trip to Vancouver, then the BS stopped. Mileage was almost double what their GM and Ferd trucks did. 3.54 gears, lockup convertor and a lil 360 2bbl with a big heart. I don't remembere what it got with the camper on though.