......... I would like to open the vent at the filler tube and run the vent at the sending unit to the fuel filter shown earlier in the thread. But then I will have a vent into the trunk.
and download SEVERAL factory shop manuals. 69 for certain, because it shows the early vent. 70--through 73, and read the fuel sections about "tanks" and the emissions sections about the evap / fuel system.
I posted this earlier and evidently you didn't see it or didn't read it. This is a good rendition of the non CA / early 70 and earlier vent. It comes out near the top of the filler, hooks to a tube, and bends UP near the top of the rear quarter, then down alongside the filler and OUT THROUGH the floor gasket and the tube ends "open" in the rear frame rail. IT IS NOT open to the trunk