Can anyone identify these wheels?

I have a kit car which came with some unidentified wheels shown in the image below:

http://thumbnails.homestead.com/files/gt1.jpg

I'd like to identify the wheels, so that I can find some better looking replacements. Based on the style, I believe these are some kind of stock wheel, presumably Chevy because the car uses a Chevy V6 and I believe corvette brakes. I'm fully aware of the irony of a Chevy motor in a GT40 kit. :)

Anyone able to identify these wheels? They are 15" diameter.

My best guess so far is that they're a 1987 camaro wheel like this, but I'm not sure how to verify since I can't see any markings:

http://www.tacreationsusa.com/images/Wheels/8292rs15gray.JPG

Those are IROC wheels. 1985+.

Add your question as a quiz post in one of Facebook groups for car enthusiasts, I always get valuable answers and recommendations there. Can advise you some if it won't be banned as spam)