My 'alpha' '73 Cat had parts of a hitch on it when I bought it back in 1982. I can't remember how it was attatched any more, but I do know for certain there was a bolt hole in the middle of the rear valence, and maybe a couple in the bottom of the rear bumper. I know I replaced both the bumper and the rear valence when I did my first 'restoration' in '84. (bumper was pitted and valence was dented)
Now you're gonna make me go out into the garage and make me look for any more holes, aren't ya.