A bit off topic but the weight of newer trucks is a shocker.
My 74 2wd Camper 9000 with a 440 and a Dana 60 weighed 4740. My 2007 SWB reg cam Ram 1500 weighs 4940 ! Smaller truck, smaller engine, smaller axle yet all the sound deadening and wiring makes up for it. I'm guessing the fully boxed frame adds to the weight too.