i have a 1990 2.3 4cly and i pulled a 70s model f250 4x4 to scrap on a 16ft trailor. my truck weighsrite a bout 3,400lb with me in it with the trailor it was 7,200lb with all the scrap it was a total of 15,000lb. i couldnt put it over dirve untill i hit 65mph only did that once that was too fast for my small truck haha. it was 42mi it took 5 gallons of gas to do it man i love my truck i have but it through hell. oh and not to metion i did all that with a blown head gasket hahaha