It's not clear which images you searched for but here are a few.
It's apparent a lot of the cars have functional spoilers. The dust in the wake is not making its way to the rear window, which suggests the airflow is strong there, and not eddying so much as i'd expect. Does this mean the spoiler is pushing the flow back into its "ideal" profile?
Capri
Some sort of streamliner
Barracuda
XKE(?) bodied streamliner
Model A
Chevy Monza
Americamaro
'52 ish Ford?
