I'm going to install new cast aluminum valve covers on a 1970's vintage 302. The issue is that the covers arrived with a guide attached for a plug wire loom that I do not intend to use. They are small L bracket stainless pieces on both covers that appear to be attached with a rounded rivet-head looking pin (it does not go completely through the valve cover). I want to remove these things without damaging the finish. Any ideas?

Thanks, Mike