I couldn't resist commenting on the Model T in the lineup of cars. I don't know about the T and altitude, but about 1985 a friend and I toured from Northern California to a Model A Ford meet in Steamboat Springs in my 29 Model A Tudor (Ford's spelling of two-door) and on the way back chased the regular train from Chama over Cumbres; we had no trouble beating the train to every crossing, and were the only ones chasing that day. Talk about atmosphere! Am planning on being there again in August, alas, this time in a rental car.