I've got gas running down on top of the muffler on the right side. I can see a gasline just inside the wheelwell but I'm wondering where the line from the other tank crosses over? It must go into some sort of valve in order to switch tanks, where is the valve located?
Any info is appreciated!

I can't remember the exact routing of all the fuel hoses and pipes back there. I remember that some of them are tricky to reach, though :-)

There is a fuel return valve behind each rear wheel, underneath a small sheet metal cover. ...often hidden by caked-on dirt. These valves control which tank returning fuel is sent to.

In the trunk is the changeover valve. It control which tank fuel is drawn from.

Sorry I can't help more.

Cheers
DD