I don't have a drawing, but the basic plumbing is pretty straightforward. Run a line from the clunk line of the main tank to the vent fitting on the header tank. Then a line from the clunk line of the header tank to the carb. The pressure fitting on the muffler goes to the vent fitting on the main tank.

Beyond that you can put a filter between the main tank and header or between the header and carb. You could also put a "T" fitting or fueler valve in the lines to make fueling a bit easier.

Ben