1975 235 Fuel System

I am looking at purchasing a 1975 Pathfinder. I've never seen one before and I am trying to figure out the 4 tank fuel selector system from just the verbage in the maintenance manual. Is the fuel selector on a subpanel below the instrument panel? The fuel strainer/sample drain handle in front of the right rear passenger seat? If so, how is this all connected? I can't imagine 4 fuel lines running back and forth inside the plane. Anything in particular I should be looking out for when I go see the airplane? Thanks for your help! Gordon