[McMurphy]

Alan,
I was going to try and tell you what I thought.
I would do a two color fill on this valve cover. The lettering all in black and the heartbeat wavelength with a black back and orange inner.

But since I dont express myself too well sometimes, I figured I would show you instead. Please forgive my poor photoshop skills!

I saved the image in stages so you could see different aspects and maybe help you envision something you like better!!

Best regards and good luck!