Spanky,
are you saying that hubcaps on 49-51 models were white? Because I have never heard such a thing, and all GM literature I have seen says they were chrome.
And Mark, basically the entire inside cab was the gray color. Except for the radio grill/glove box cover. And the steering column/wheel/3 speed shifter arm was a different color.
And according to the 1951 restoration pack, page 122, the inner grille bars that year were "waldorf white."
