I got the 61-64 full size Ford tank late last week. It's true that it will mount using the old Edsel mounting straps and that the sending unit is on the front of the tank instead of the top which is not a problem. It is a non-vented tank so it will need a vented cap but it does have a flat where the vent was on the old tank so I guess you could put one in if you wanted to.
What wasn't mentioned when I ordered it was that the filler neck is about 4" too short and not bent correctly for the car. It sits to deep behind the license plate. Maybe you can reach the cap if you have long fingers and don't mind getting cut on the sharp opening in the body behind the plate.
I will have to modify the neck using the neck from the original. The new filler is a slightly larger diameter so hopefully the old neck will fit inside pretty tight for welding.
John