So what do you think. I was thinking these were the 17" retros but they are not. I called and they are actual 80's wheels. So my question, you think they would work on a '86 IROC and what do you think it would need for a tire since it's a 15"??

 

I've always liked the look of the various 70s and 80s era rally wheels in 15". I think our cars can lend their nice lines to either a modern muscle, large wheel look, OR a retro, more "muscle car" look. If that's what you're asking, I think they look great. As for tires, I think a stock 15x7 wheel would run a 235/60/15, which puts you right at 26" diameter, which is pretty much stock. If you want to go bigger, then I suppose the options are limited by what you can cram under the car and what tires are available.

You wouldn't happen to know anything about cylinder heads would you?