I just wanted to weigh in on this comment, I happen to own a F-350, crew cab, long bed, diesel, and the last time my Dad and I left the scrap metal yard, when we weighed ourselves after unloading the metal, with just the truck my dad and me it weighed 7,700lbs. and my dad and I are probly both around 200lbs a piece, so thats still 7,300lbs of truck.
But, I do agree, I'm doing basically the same thing you are, one ton running gear front and back, and a Isuzu 4BT diesel, and I don't think the truck is going to weigh anywhere near as much as the F-350. Have you ever seen the size of the frame rails on a 1-ton? Just those alone have to weigh about a ton (ok, maybe thats an exaggeration), but they weigh a lot more than the frame and body of a Ranger.