Don't believe the Super Stock wheels were a factory option Custom Cruiser, but they do look good on it.
I believe Olds SSIV wheels were only available as an option on 71-72 Delta 88’s. Very rare and expensive if you can find a set today.
That brochure above is from 1971. The '76 Olds brochure shows only one wheelcover available for the '76 Ninety-Eight and Custom Cruiser (the left one in the top center in the image below). In addition to this one, the Delta 88 could also have been had with the one on the right, a simulated wire wheel disc.
71-72 88’s were the only cars that came factory with the SSIV’s on them. Really neat wheels though. I restored a set and put on my 72. Wish I had a set for my 76