64-66 Barracuda top of 1/4 panel moldings

Are these stainless or aluminum? There is a difference between 64-5 cars and 66's!! 64-5 have stainless upper trim and 66's are aluminum and have a different profile to meet the taillight. The stainless trim will work on a 66, but not without some modification to the open end where it slides over the taillight. Hope this helps, Geof