Got me them mag wheels. In the late 70s in Seattle, I owned a Gray Top cab for a couple of years. Was a '72 Plymouth Satellite with a 318. That was about as small as the engines came in terms of cab donor stock, but it was fast for a Detroit sedan. A guy at a service station where I took it in for quick emergency fixes was selling some mag wheels with excellent tires a tiny bit bigger than what I had so I bought them, had the meter adjusted. I swear, I might be the one who started it. A few years later I noticed Yellow Cabs with a sort of chrome looking alloy wheels. Could well have been chrome plated steel but they were definitely hubcap-less. Less to have to mess with. Before long they were on almost all the cabs.
I later drove some of those Yellows, usually former cop Chevies with big 8s and it's funny, but I don't know what the wheels were made of.
The guy I sold to later bought a Plymouth Volare wagon with a slant 6. I drove it briefly. Gutless but economical and you could get airport runs ahead of other cars if they asked for a wagon. Sorry for the TMI.
*Ah* Just found this pic of chrome plated steel wheels. Looks a lot like what I recall: