My neighbor passed away and I bought most of his old car parts from his son. He had collected Mopars since the late 70s. There was a whole pile of these new antennas and I was wondering what all they might fit or are they garbage?

The solid mast was new for the 1972 model year.

Worth some money today, since can't really find in junkyards these days.

That is a FM antanea, not sure if they were the only ones used after 1972 though

AM & FM. The 1972 model year introduction page at https://www.hamtramck-historical.com/images/serviceHighlights/1972/1972%20sh%20p33.jpg

Here's my 31' solid mast antenna that was on my '70 Barracuda until I finally got the correct telescopic one. The base doesn't look anything like yours (or Alaskan's link) so I can't say what yours would fit. Until you find out I wouldn't throw them away.

My memory is fuzzy but that picture looks like I remember the threaded section of a 1983 Ford Thunderbird FM antenna.

my experience has shown the mopar threaded antennae mast fits from introduction up at least into the early 2000 m.y. , and possibly until the new style was introduced.
they also came in black [powder coat ?] and with spiral ridges that was intended to cut down wind whip.

I worked at the dealership from 70 to 74 doing new car prep. I’m thinking 71 was the first for solid mast but either one would fit the fender part.

New for 1972

The 1972 model year started in the 1971 calendar year.