Gas pedal differences

[ScottH]

Can anyone tell me the differences between a 68 gas pedal and one from a 72? I recently bought a 68 and it's missing the pedal, only the rod is there. I know the 72 is a floating pedal and uses a cable linkage. The 68 is also a cable linkage and don't know if that is original or if it was changed. If it's original then the only difference would be in the floor mounted vs floating pad? If this is true, is it easy to swap the original to the floating style?

Any info is appreciated. Thanks!