sweet I may take you up on the tank. Mine is dented too and I think the Petcock doesn't work. It seems the flow of fuel is not right. I mean when I fire up the bike it revs super high for about a minute then it comes back to a normal idle then when you ride it it quits idling. I am sure it is something with the tank and the petcock. I have been through the carbs and they are clean as a whistle.
You have inspired me to get off of my ass this weekend and take mine apart. Thanks for the pictures. Nice work.