hill,s is really not the issue, l have been pulling a 35 foot with 16 foot slide out with my other truck a 96 ford f150 extra cab 4x4. then l bought the 95 f250 extra cab 2 wheel drive long bed. l pull it back and forth to the river about 30 to 40 miles away. then l just bought the 2000 28 foot 5th wheel and people is telling me l have to have a diesel. now it has me second guessing myself. l havent use the f250 to pull it yet cause l am having the 5th wheel hookup installed on it. Thanks for all the help.