Dale, hope this helps. Not sure on the return line on the '46, but on my '50, it goes into the head at the right front corner. In the second picture, from another members car, the inlet line, attached to the side, top of the filter can be seen aattached to the main oil gally below the coil. There are several connections available on the gally to choose from. In the first picture, the return line from the bottom of the filter attaches to the connection seen at the top front of the head. Ben