Correct Motor Color on a 68 GTS

Black! ? I never saw a mopar motor black in 68.

Now my 71 Duster below is all original under the hood. and It came with a black motor. It is a special mix black.

This car is all numbers matching. The vin tag , The regitration , And the licence plate. I was just pulled over and they confirmed all my info is correct. And I have several citations to prove that.