I met a guy once who was building a 750 hill climber. The core he was using was a 1972. I got to go over and go through the cast offs and buy what I wanted. Much to my surprise the gas tank he was not using was a wrinkle. He was going to saw the mufflers off some great HM300's and run straight pipes that luckily I saved. Got headlight,turn signals,rear swinger and a ton of other goodies. Parts really got moved around on some of these over the years !