Wind whistle when top down

Moldings around the front glass are the most common source of wind noise, any model.
Rangers and Bronco 2s had a strip of vinyl under the reveal moldings that would make a buzzing noise at speeds. Fix was a easy as shoving lengths of vinyl banding from boxes in the voids.
If your front window stainless has never been removed, you'll likely find the adhesive backed foam rotted to powder. The good thing is the same material can be found in hardware stores weather stripping supplies.