George,
I like the direction you're going with this. I personally think 22"s are a bit much for Chevelles. To me, they look more at home on a larger car like an Impala. Once you get over 20" on an A-Body, they start to look like those little DUB toys or "Donk" style cars popular in rap videos.
The Chevelle/A-Body clients I've had in the past had a lot of luck with 18"s Front/19"s Rear. If you want a little rake, I've rendered cars with a taller sidewall.
As for rim choice: I prefer the Soft Lip/Fat Lip smooth hoop style to the stepped hoops. It has a more modern look. Boyds, Foose and Billet Specialties have a great selection of wheels. Have you also looked at
www.introwheels.com ? I've been spec.'ing them a lot lately for my clients.
Gimme a shout if you want a rendering done! I can play with colors, graphics and wheels 'til you find the right combo. Check out the Artwork page for portfolio samples from all the talented artists on this forum.
Good Luck!