1966 Chevelle roof rail blow out clip

[Edgemontvillage]

Mitch, I recently restored the original blow-out clips on my 69 Camaro project and although the clips differ as you mentioned, the rivets should be the same for a Chevelle. Here are photos of the rivets I used which are an exact match to the originals and the punch to install them which worked well. The punch is a "snap rivet setter" I purchased as a set on Amazon. I re-vulcanized the clips using Plasti-Dip in the can which is much thicker than the aerosol version.