What Color Engine Bay?

I can imagine seeing it parked at a show or cruise, sitting with the hood up. Walking up to it, you couldn't help but wonder what he could be showing off under there to have it propped up. Anticipation would build. Then BLAM!!! That's the effect I was thinking of. A pleasant surprise hidden under it all.
Can you imagine people expressions when that whole scenario plays out and they walk up and it has a Hellcat engine in it instead of a small block? :D