I will get a pic shortly, they have the "V" logo in the center with lines around the outer edge, no plymouth writing on them. These were correct for Valiants, I think all Barracuda's came with full wheel covers from 64-66 from the factory, but if a few snuck out with hub caps, they would use the same one.
Here are some unpainted ones used from 63-65, in 1966 the center logo was red and blue, also the ring around the logo and the little rectangles on the edge were painted black.
Im pretty sure the 66 had the flying coffin, not the blue and red V. I can't find a pic on line, but I did find the full wheel covers and they have the flying coffin, like the horn button.