Every post i have seen and any other research I have done says there is no known paint code. The various factories mixed their own paint and it was a blue gray but slight variations from one plant to the other. the closest I found was a F**d engine gray. there use to be a Chevrolet engine gray but it was discontinued several years ago. I used Chevy orange and Chevy blue for the oil cannister. Classicparts.com has the Job Master valve cover decal except they show it for the 261. they don't have the big bolt 235 version.
Valve cover decal
