That’s a complicated question. To start with the 2F didn’t appear until 1975. That aside so long as you use the transfer case that’s on the 4speed then drive shafts should be your biggest challenge. The fan shroud from the F motor is not going to work either. So much as bolting in it’s not that hard. I am sure others will add in some more. The three speed transfer case would need special adapter to bolt up to the four speed.