The 235 color changed in 1954 from a gray with a little blue in it, to a gray (with little or no blue in it).
In 1954, Chevrolet called the truck 235 engine color "gray", in at least one publication.
Unless someone has documented GM engine paint color codes, the name/names of the possible shades of engine paint gray is unknown/unprovable.
I'll go with the color "distinctions" of the "recognized expert" that posted that 1996 list of engine colors.
