1967/72 F100/350's were available with optional bucket seats. These were the same bucket seats used in 1965/70 Mustang's, 1967/70 Cougar's (All-except 1969/70 w/high backs).

The seat tracks are also the same as 1965/70 Mustang & 1967/70 Cougar, but...

In order to install these bucket seats in F100/350's, 4 brackets (Right/Left Inner/Outer) were required to raise and leveled the seats. These bolt to the floor pan, then to the seat tracks.

These brackets are reproduced, available from FTE member Bill W who usually posts in the 1961/66 forum.