When I last layed my eyes on an original engine in original paint in person, It was hard to tell the difference between where the paint stopped and the oily grime on bare cast started.
THAT is the original color: dirty oil-on-cast-gray.
I have recently seen an original 55.2 engine with the original yellow 235 lettering on the valve cover, and the gray was markedly lighter than the AD engines I have seen. You could persuade me to admit a bit of a blue hue in the gray coloring.
Carl
