Some debate
There is some debate about the actual color of the original 1962 valve colors, they were painted a slightly different silver hue than the other silver valve covers prior to that year. As mentioned, istarting n 1963 the passenger car valve covers (both drippers and the 340 horse ones) were chromed. Not exactly sure of the truck covers, I've seen blue and I've seen grey. Probably depends on the application?
I think the 348 covers were all Chevy Orange?
Cheers,
TomK