[Ironhorse]

Agree about the 6 lug / 8 lug thoughts with possible swapped fenders or axles but if want to know for sure look at the VIN on the cab and make sure it matches the title VIN. Not sure about the square body trucks but for the 67-72 bodies I am more familiar with the General stamped a partial matching VIN on the LH front frame portion near the steering gear box. Pretty sure will have to scrape away some dirt, grime and crud to find it. May or may not be the same for square body trucks. If it is there and partial matches the title VIN at least you will know what the truck was when it left the factory. Good luck and last thing, no clear title in seller's name, no buy. Opens up too big a can of worms down the road.