I would guess there is maybe 80 different styles of the dog dishs caps, that Chrysler used over the years. That dropped down to one consistent theme in the early '70's (see post #5) but even then there is still a lot of variations of it.
I've never figured out why, but the police vehicles used caps with the ring of holes on them (Lower left picture on post #7) – but even then, I would find the occasional police car without holes (but might because police stations might have older spares, in case of lost or damaged caps?). I don't care for the holes, myself.
I prefer the small hubcaps, myself. It makes for a simple but elegant look (IMO).
The downside to converting to (I call 'em dog dishes) is full size hubcaps always leave marks (and scratches) on the paint afterwards – which looks tacky. The wire hubcaps leave even deeper scratches than flat hubcaps do.
These are the original hubcaps for my (base model) '77 Volare wagon – but the original 14” wheels have been replaced with '80's M-body 15” wheels (mainly because the 11¾” brake rotors won't work with 14” wheels), The scratches are dug into the metal – so no amount of sanding will remove those marks. That said, I do have plans on purchasing a new set of 15” police wheels for this car so I don't have to worry about these scratches.
One last thing. I have read on how full size hubcaps are not preferred for hard usage because of a lack of airflow to brakes. I can't comment about how much a factor this is, first hand, but it sounds logical. The normal wheels have four vent holes (if you want to call it that) where the two wheel parts meet at – but not sure just how much air would flow through there.
The police wheels do have larger holes – but even then, not sure how much air would actually go though them – but still would be more than using full size hubcaps.
BudW