Had a 7.3 turbo in a 99 F tree fitty that sounded like it was going to see Jesus any minute.
Mfer would pull whatever you could stack on it as far as you wanted to go, and would do it at 100 mph if you had a little room to get it there.
Also got above 15 mpg, usually around 18. Unloaded, with just the service body, welder, torches, gang boxes, etc would be about 20.
Had 450 K on it when I took it back and swapped for an 07 F450 that was a POS.
That 7.3 had NEVER been into.
Had starters, water pumps, alternator or two. Shifter cable. Maybe a sensor or two. Engine, transmission, rear end were all still original.
Show me your Chebby/Dirge that lived THAT life.