72 C-10 Charging issue

[heighway77]

The truck has a new alternator, battery, and voltage regulator and still will not charge the battery. The Battery is securely grounded to the engine block. Could there be a bad ground somewhere else that is causing this? If so would anyone have a link to the wiring schematic for a 72 C-10 with a 307? I did notice there is a ground that is connected from the frame to the body that is broken...could that be it?

Thanks ahead of time...I think the guys at the parts store are tired of charging my battery every 3 days :-).