Here's my '76 550K.
WJL75,
You have a nice bike. Not too polished and pristine, but not too "rat bike" either. I will be going for something similar to this. I think I have about decided to try to keep my total budget to about $1000 including the price of the bike [$500] so unless I sell some parts I am looking at about $500 to spend on the build.
Yes, I pounded in the tank myself. It really was not that difficult...there is plenty of information on this site if you do a search look for keyword "deadblow" or "knee dents"
Other than the tank, I changed to clubman bars, changed the turn signals and added paint. That was it for purchases. The rear fender I cut with a dremel and spent a lot of time cleaning and removing rust.
Glad you like the look. For a while I was looking new cafe seats, but this one is growing on me.