I've spoken here many times about my years in a Ford assembly plant,30+ to be exact. At the plant where I worked we built F series pick-ups from 1973 till 1982 then came the retooling to build Rangers and Bronco II's. In those years that we built the F series trucks we only built regular cab trucks,no super-cabs or crewcabs, and no step-sides, all were F100- F350. Bax, you may be right in your post but I don't ever recall seeing a 5 lug axle in anything other than the half-ton F100 and F150's. If I'm wrong I stand corrected, That was many years ago, so be kind and not chastise me too hard, my memory ain't what it used to be.