I have a set off a 74 455 in really nice condition. You can run them as is in my opinion. I can ost up pics if you'd like?
I have a super nice set that were just blasted last week. No rust, no pitting. (About as nice as you'll find for 50 year old valve covers) I have all the correct hardware as well. I can get you pictures . . . . Todd
Roland is a person that works for the company that made the covers for Poston. They are not in the car parts business. Roland got smart and ran some ads in Hemmings after Poston went away and word got out to call him.