Fuel Tank Valve Question

[coloradosean2009]

My '72 has two fuel tanks. The side saddle was installed by the PO and previously used an electronic valve. The valve has since been removed and the side tank taken out of service. From what I can tell, only the tank in the cab has a return line.

I want to put the second tank back in service but I am not sure if I need a valve that allows for return fuel or not. I am guessing that the PO just burned the main tank first, then switched to the side saddle, then back to the main to burn up the remaining fuel that was returned.

Would this one work? http://www.tomsbroncoparts.com/product.php?id=1411

Any thoughts and recommendations are always welcome.