First one looks like Bronco or f150, 2nd is 48-52 truck(possibly) third later style ford 9" Torino style. The 2nd type, what size drum would it have taken?
The last pair of Speeday Fenton headers I seen, the block mounting flange areas were not on the same plane with one another. A metal straight edge showed each one was different. Easy fix for someone that has a machine shop, but not everone has mills and 24" long sanders.