Hi everyone. Super glad to see the forum is still going, its been a few years but I used alot of the info in here to fix an old bike up my girls dad gave me. So basically got hit by some drunk chick and my frame is cracked by the neck and its been sitting neglected outside. some rust by the crack now. But Ive been itching lately to get it back up and riding. I found a few frames online but my bike is an 81 and for some reason it seems 85 450L frame is easier found. Would this be of possible use to me? I personally would prefer to have my old frame repaired but not sure of the integrity/if Id be able to trust. So anyways does anyone have knowledge if 81 450L frame is interchangeable with other year or makes? Thanks!