I think I might have solved the "cut-pile" or "80/20 loop" carpet mystery

This 1973 Dart Sport was “sporting” the original carpet when I got it. It was cut pile carpet, so I assume by 1973, cut pile was the choice.

However, when I got this 1973 Roadrunner, it had level loop.

This 1979 Roadrunner had cut pile.

No rhyme or reason it seems!

E7DBA838-E6B6-411F-ACE5-154DD7191138.jpeg

EB2C617F-61FE-4590-B883-87EE3FCF2CD7.jpeg

689F58D6-0AB2-420C-9B71-D80CF872178D.jpeg