Gotta love those vintage, steel mountain bike frames. I found an old Schwinn High Sierra frame that I was able to date by the frame color to 1986. It needed minor work with a torch so the bad original paint job was an asset, not a liability. I spread the rear end to 135 so I could use contemporary mountain bike hubs and 8 or 9 spd clusters. I am tired of fooling around with freewheels. It now has indexed trigger shifters. I love it! If I ever do any serious off road touring I just have to mount racks and I am good to go.