TKM-
I received my 16x8 wheels from Vintique. They were a bit flaky, but persistence paid-off. I need to size-up tires and keep an eye towards clearance. Hoping I don't have a problem. When shopping for the 8 log wheels I couldn't find 16x6 or 16x8 wheels. I'll let you know how they fit.
On hub caps, I haven't tackled this yet. I'd love to hear from anyone who has changed from the original 15" wheels and successfully fitted-up the original Chevrolet hub caps to 16" wheels. If I don't hear back from anyone successfully making this change, I'll take to my machine shop friend and start mocking-up ways to attached clips to new wheel to fit the original hub caps. Stay tuned. Thanks!