Question about the steering Lock: Tried to use the steering lock and discovered that 2659 came with a plastic steering lock cover, but no steering lock. I had bought a spare ignition key from a fellow in PA, who later sold me a NOS steering lock with keys. Tried to install that with a key inserted and turned so that the locking pin was in line. The tumbler wouldn't go in. Looked at my 1973 to compare, but it has a different set up. See attached pics. What is the correct way to install the steering lock? As seen in the pics, was the Sandcast steering lock housing on the frame different from that on later bikes?