for the correct factory apperance the dark red is correct,,,dont use the mopar spray paint its rubbish,,,i used it for years till i found better the mopar peels offf,,,i used paint from hirsh,,it comes in a quart can,can be sprayed or brushed,, i brushed mine looks great,,,it is currently red in a 66 cuda,, but im chainging it in the near future,,because i hate RED lol but the new color is top secret,,,my old school hemi is also red in a blue car,,changing that to um,,,blue i think,,heres a pic of the hirsh chrysler red paint on a 340 motor in a 66 cuda looking like a 273