1964-5 Barracuda lenses were clear, bulbs were yellow. Or amber. As I recall, all the manufacturers went to amber parking lights in the 1963 model year. Some used amber lenses, others amber bulbs.
I've seen some bulbs that were just painted yellow; others bulbs used amber glass to get the color. Not sure which was original - been many, many years - but I think yellow paint. I use the amber tinted glass bulbs now, just because the yellow paint will burn off after a while, as you can see if you look closely at the painted bulb on the left, below.