This link shows the 3 on the tree for pickups. They didn't start using them in 1948 but they were retro fit on some occasions. The later F100 set up is different but might be usable with some mods.
https://www.ford-trucks.com/forums/1...l#&gid=1&pid=1
There is also a link on there for the F100 diagram and it looks similar in some ways. The 3 on the tree was not as common in the F1 years as it was in the F100. There are likely a few still out there though.