re: Type F ATF.
Years ago Type F was recommended to firm up the shifts in a TQ. because of the absence of friction modifiers. Ford, (Type F), smoothed their shifts by using a different clutch plate material than Chrys. or GM.
If in '72, you ordered a suregrip, you got an 8 3/4", and also a larger radiator as a package. And yes, the 8 1/4" rearend wasn't used until '73, and '72 was the last year
for SBP.