What would you do?

If you know what color you want to paint your car in the future, go ahead and clean up the engine bay and shoot it.

If you don't know what color you want eventually, either black or sublime and plan on pulling the engine when you finally do re-paint the car.

Regardless of which way you go, suggest removing the 90º oil filter adapter to avoid scratching the passenger side fender, if you're doing the motor install from the top.