2 questions: 1. would 31" tires fit on my '72 without a lift? My current tires measure about 28" and are mounted on 8x15" white spokes. (or would I be better off stopping at 30's?) 2. Would a 1" lift (rear only) be do-able without any other mod's? Look forward to hearing from you! Thanks. You can't beat going Topless!