I don't understand what the problem is. Get another bike that conforms. Your wouldn't show up at the local Ford Falcon rally driving a Mercury Comet would you? The old stuff will work out fine and you will have just as much fun. I've done 3 Storming Of Thunder Ridge rides on 1972 bikes. 5 speed cogs, triples and MAFAC Racer centerpulls. One year I had to descend down the back of the mountain in heavy rain. The bike was money all the way and the MAFACS did their job.