This is not mine but it looks really good, no worries with the weight police. If I were full time ...... https://phoenix.craigslist.org/cph/ctd/d/fontana-2007-ford-f550-4x4-custom/7033665555.html
Been there and done that with a 6.0L. If anyone is set on an older Ford, look for a 7.3L; it can take time to find a good one and be prepared to pay for it, but it will save a lot of headaches. There is a very good reason why 7.3L trucks still fetch an insane amount of money.....