If you decide to go the modern route - I'm not saying you should, but you'll get no objection s from me if you do - pay careful attention to spreading the rear triangle. I have had 120mm rear ends spread to 130mm without incident, but I also have an experienced pro do it. The key is that you also have to make sure the dropouts are properly realigned so they are parallel again. Too many folks miss that part, and it makes a difference, both in performance and longevity of the frame.