I bought 9 cb750's this month to resell to generate funds for my diecast paint job. I'm keeping a few of the nice parts and while unloading I noticed the bottom of a K5's engine is 1002695. I'm going to swap it out for a K4 engine and look for a good head and cylinder block for it. I've got a set of carbs and a valve cover close to that number.
I already have a complete bike #5511 it's a preservation bike. Not restored but pretty nice. I've put on oem handlebars, it's original rolled rim, a new red seat foam under the original cover and Honda side covers. The rear spoke nipples are incorrect, that bugs me.