I just noticed that you had said you are strongly considering black.I’m strongly considering going with the black just to make everything else really shine.
My reaction to black, as a "spectator", would be that you bought a crate motor, and didn't bother painting it.
Black is the standard GM crate motor color...
Something like a bronze, as curtis73 mentioned, or an aged copper, would offset the polished and chrome stuff, but wouldn't look "unfinished" like black would.
But it's your truck...