Another "what's the difference between"

Well. I put a wanted ad on craigslist for Magnum 500 wheels. Last night a man called me up and said he had some.We talked briefly like we were old friends. Then he wanted to know what I was going to put them on. I explained that I had a Barracuda that I was changing from 4" to 4.5". Well, damned if he didn't have a set of Cragar SS mags w/ 4" BP.
I went there today and drove home with 5 road wheels with four excellent 215/70/14 tires, 4 magnum 500 wheels (3 in really nice shape)and 3 nice center caps. The road wheels are black outside with perfect Ford center caps.
The magnums are 6" and 6.5". All wheels are 14". I'm going to paint a road wheel silver and buy some trim rings to decide which wheel I like best. I'm pretty sure my preference will be the chrome 500's with raised white letter Goodrich Radial TA's, if they're still available in 14".
Does anybody know about the 1/2" different widths on the rims? Also, which width trim ring goes with these? Do you prefer the chrome or stainless steel? Were any of the Chrysler road wheels painted black on the outside rim? Was Ford painted black?