I was around back then when those Corvettes were new. Mag wheels were just catching on and becoming readily available. They were still pretty expensive for most people. The majority of 'hot' cars had white walls, black wheels with baby moons or chrome reverse wheels. If you had mag wheels on your car in '63,you were really cool. Watch American Graffiti,the black '55 Chevy has chrome reverse wheels,as well as Milner's coupe.
The GM factory offered the knock-off aluminum wheels,but from what I've read they didn't work well at first. Air leaks and things like that. And they were $$$$$.