Perry's Resin Porsche "Humps and Bumps"

Has anyone any experience with the Vacuu-formed "Humps and Bumps" Perry's Resin makes for the Porsche 962 shown here? (http://www.perrysresin.com/catalog/cat_sportscars.htm) I am curious about how large they are. If anyone can give me some measurements or if anyone can just tell me if they are large enough to fit over an I-4 valve cover, I'd love to know.

Thanks!