I have a 1983 280ZX and I am trying to find out what the largest tire I can put on it is. I have searched, but did not find my exact situation. I would like to keep my stock wheels. I do not know what my wheels are off of, and what offset they have. They are a 15" wheel. Can someone tell me what wheels I have, and what tire I can fit? I think I am at stock height, but I have a 318 V8 in the car which might lower it a bit. Any help would be appreciated!!