Fuel Vent Question

Assuming 66 is the similar to 67 (most likely it is) There us a bung on the filler tube where the filler tube bolts to the quarter panel.

The vent tube connects to that with a short piece of tubing and 2 clamps. Then follows the foller neck down through the floor to inside the frame rail.
Like this ( but not necessarrly the same shape )

Screenshot_20211102-111215.png

There may be some looping around on the top end.

Screenshot_20211102-110858.png