I guess it's just the way I remembered the one owned by a girl who everyone um, uh, *knew*. I had I think a 78, like you said smaller. And it was just a little step toward the later boxy look with straighter lines. Mine was about 11 years old when I bought with I think 37K miles on it and people thought it was new. I really liked it but traded it in to buy my first company van when I started my business. It was up to about 100K miles then.
Young enough to learn ... too old to remember.