Thanks. I will do my best.

Why would they have put a second line all the way to the engine? This second line completely bypasses the electric fuel pump. Do you have any idea why capping the second fuel line from the tank would cause the carb to overflow, but not when it was free to vent?

The 68 Pontiac Shop Manual seems to depict a short valve coming out of the gauge on the tank. What is it for, as the manual nor Chiltons describes it, yet they both depict it.

Thanks again,
Dave