Engine Color? Ideas needed

[chevy_mike]

Well, I haven't made my paint choice 100% but I keep coming back to my original idea. I am looking to do a satin black exterior and a gloss hugger orange on the inside of the bed, interior and inside the engine compartment. Rally wheels most likely will be this orange as well. I will then do traditional flames, yellow to purple fade with blue pinstriping. I have had this idea in my head for years now.

Now comes my problem... what color do I paint the engine? It's going to have kind of a old school look with finned oil pan, valve covers and air cleaner. The low areas in the fins will be painted with the rest of the parts polished. My issue is, I was going to do the block and these finned areas in orange but with the engine compartment orange, it will just get lost in there. What ideas or colors do you have?

Another thought was to do the inner fenders and core support in black and the firewall and underside of the hood in orange. This would tie things together but allow the engine to pop.

Ideas or thoughts?