Yes the center cones interchange. The ones I have are correct for 65 as they have the Valiant-style emblem. The 66's have the Plymouth emblem and I can not tell what was used for a similar style hubcap for 67, 8 and 9. Take a look at http://www.hubcaps.org/barracuda.html Take a look at their number CHR319 for the 67, 8 and 9. It appears the center dome is the same as the 66 and it appears it takes the 2 inch long wheel lugs also.