The advance line from the carbs crosses to the driver's side (LHD) of the valve cover, runs along the side of the valve cover, crosses behind the heater valve, attaches to a bracket securing the rear heater valve nut, and then dips down to the distributor. I'm sure there are pics out there. Whitephrog has great ones. For my build, I ran it across the front of the engine and then down the side. I secured mine on the thernostat housing studs. Are any of the original type advance lines available with the "I just ate a rat" bubble in them?