Its been a few years since I have really been invovled in vintage racing. When I took a hiatus , post vintage or EVO if you will, was just beginning to be promoted as another facet of vintage racing. Now, in scanning some web sites and reading of occasional result articles in Cycle News, the post 74 era bikes have gained ground in numbers and popularity. Have you active vintage participants found this to be true where you live and race? I would suspect that the possible scarcity of parts for pre 74 bikes, and the waning, read aging, of racers most apt to relate to them is a cause as well, no?