A slight enlarging on the tanks hole is also required.
Visions of things going "BOOM" in my head
Yes, pinching the vacuum line would work... But I can't imagine doing that AS I ride down the road haha!
The petcock you mentioned.... Where? Any links? Is that a brand? Or a model?
And yes it was Steve's site where I saw the overflow tubes. Years ago I read about his jet kit too... I think I will do that, I think I remember him talking about the fact that the c10 (if in perfect health even without his kit but certainly with?) can wheelie (first gear @ 4k ...slam throttle open). Mine has NEVER been able to do that!