I'd say it is - at least it would be for Chev where it would be a 54-56 wheel - in 57 Chev shortened the column and added a 'dished' wheel, and I think GMC was the same, but they may have been a year behind Chevy [like w/ the 6V] - also I've never seen a multicolor wheel like that or door panels painted that way either, tho it mighta been a 'deluxe' feature
Bill