It is also worth noting that the only way a car recieved a bodoy coloured steel wheel was if no caps were ordered (which means the dog dish style was installed);
If a car had full sized hub caps, it received black wheels.
Also trim rings could be ordered with "no wheel option" to compliment these caps.
To the best of my knowledge, you have to look at period assembly manuals to find if steel wheels in body colour would have been used.
I was quite happy to see that my car's colour would have received colour matched wheels from the factory.
IN my collecting 14x7" steel wheels, I got came across two body coloured wheels (one 1970 CL in silver, one 1973 EM in a dark yellow) before pony-ing up to buy a correct set of four wheels for my car - those ones were also painted body colour (a metallic green).
__________________
1970 Formula 400 Carousel Red on black (std) interior "no drivetrain option" car (same base drivetrain as GTO) 1:411 1970 Firebird Formulas originally sold in Canada
Ok, i have the original spare that is a 14 inch, it has 3 lugs approx 10 inch, the 15s i have on the car have 4 lugs about the same size-10 inch maybe 10 1/4
Typically in any given year in the 60s and early 70s there were about half a dozen body colors that would be painted body color on specific cars built with only the basic hubcap (dogdish). Generally they were medium colors rather than very dark or very light. In a few years that I researched the possible wheel colors were also the accent striping colors back when accent stripes were paint rather than decals.
I always wondered about why GM bothered with this, seemed like a lot of bother and added cost, especially on the cheapest models and typically those ordered with little extra profit options. Who knows what the logic was, probably just an old habit that had long outlived its original value by the 60s.
One thing to watch when buying these caps is they tend to stress crack around the edge from the pressure where they snap into place. This makes them creak or even potentially fly off.
