Keep the studs if you are wanting it to look correct. I have 67 GTX and R/T cars and I think they came with standard hardware not chrome. And the original cars have the studs in the corners and no chrome hardware, but no turquoise engine paint on them either like they were from a different car. This has been my observations over the years.

Unsure about the BB Darts, but they may have followed the same way.