1975 z1

I am not really sure if I want to build another bike from scratch. I have quite a few extra parts for this 75 and I have some other 76 kz900 stuff too. I have an extra 1000 kz jug if it is wanted to be a bigger bore than an 1105? Bike always ran good but when it gets hot it started to smoke a bit, I'd say it needs a kit. The head is a Schnitz valve-job and cam setup head with I would guess 1000k miles? I also have a set of Mikuni 29 smooth bores that may go with it, along with some 26's. I will add all this stuff together with this bike if anyone is interested in it.  The frame has no extra cuts or cracks. It is a 75 z1. I know the owner but can't get the title. He is older and confused about it. Not sure if I can ever get it?

If I happen to sell it? All parts go with bike, no parting out.