I found this chart on wheel size and fitment:
http://members.rennlist.com/1976c38/index.html
1) For those who have 7s with 225s up front, what is involved with rolling the lip.
2) Is the answer to the 8/9s with 245s question that 245s fits better on the 9s? I suppose 8s and 9s will be somewhat similar in price, so just get the 9s?
Doug