DOHC's Z1-R in pieces

Model year changes following summer shutdown June/July  so anything built after July 77 would be 78 model year

It really doesn't matter to me that it's a bitsa bike. I am just puzzled that someone would go to all the effort to take a perfect 78 frame and add every other part from a 79 or 80 to it.  Maybe I'll turbo it after all.