60~62 i always called toad bodies. they're different but enough the same to include, kind of like amc's at a mopar show.
63~66 early or narrow bodies
67+ regular a's
but if you're specifically talking about barracudas, you can say 1st gen, 2nd gen & 3rd gen and somebody will know what you mean. and while i guess you could say the same about darts and valiants, i always just make the delineation of early and late and call it at that.
wait, what were we talking about again? oh, that's right, some psychotic pedantical granular break down of the same body types. that's some serious eating soup with a fork behavior.