My poor old 7.3 is tired, been whooped like a cur dog as to being used as a load hauler, I tended to make it work harder than many ever did. max speed with the chevy on was 72mph on straight level, up hill was down to low sixties working its ass off and has been chip reprogrammed for better response(A dozen Years ago) with a fuel mileage increase due to ULSD. just shy of 340,000 miles and all but the 12 on it when bought it were mine. No major engine work(knocking on my wooden head) but have had a trans replacement two third members where the 10.5 Ford Corporate stood up somewhat well, and misc other stuff as water pumps under cover harnesses, glow plugs. Cab is imploding as most of these do, thought about rebuilding that but cannot justify as so much other will eventually go south but 21 years and the miles against the loads has justified its purchase those years ago.
Wanted to go to the quarry and weigh out with the Chevy on, was too scared to know what it really weighed, truck been licensed 24K for years as dragged tractor with implements back and forth to BILs farm for years.