those 7.3L diesels kick ass. the farm I worked at had two '88 F-250's with the 7.3L. there was a big hill by the farm, and one time they rented a bulldoser (im not sure of the size, medium, not a skidsteer by any means) and put it on there already heavy hydrolic dump trailer. the truck towed it from a stop, up the hill without a grunt of discomfort! one was a 4 speed, you could accuually start out in 4th gear if you wanted and it wouldent eaven notice!