Well if he is going to just repaint the entire engine, and that is what I would do, then most any new model vehicle with black paint would suffice. Seems everyone of them now has metallic black paint jobs. So pick one and go for it. And for the record, most paint colors are not unique to the individual vehicle manufacturers anymore. What one company calls their black finish, just happens to be the exact same paint with another name for it from another company. One might be "Midnight Sparkle" while the same color could be named "Ebony twilight" (names are made up for example). JMHO