There's quite a few guys runnning with adapters on their cars. Check out
www.racehome.com and look at Tony's car. He's got some 'Vette wheels on it, and he's run it on a track just fine. Get the one's from Vette Brakes. I'm thinking about putting Z06 wheels on my car too. My neighbor is running some on the front of his '65 Mustang. He's running a set of '00 Mustang GT "Bullitt" style wheels. He hasn't had any problems.
The adapters bolt to your stock studs. It's kinda like bolting on a set of wheels. Just as strong. The wheels then bolt to the adapters, which have new studs installed. You really shouldn't have much to worry about running them.
Edit: Check it out here.
http://www.racehome.com/techwheelfit.htm