Engine paint.

Slantsix64 said
Look at the difference between Chrysler industrial red which the valve cover is painted. Compared to the intake manifold.

View attachment 1715366127

The intake manifold and part of the head looks like they are a bit "bleached", and it is not at all like the remains of the paint on my valve cover.

In my search I came across this list. If it is accurate or not, well I am not the right one to judge that. Mopar engine colors 1960 - 1973

Bill