That's it. Use one of them. For routing. Of course there isn't an original to copy for a '67 318 2bbl, but it should go back to the firewall and then through a grommet.
My car was originally a 225, but my guess is the grommet location was the same for v-8 with the vac gage.
That's the original hose. It's a smaller OD than the typical vac hose from the parts stores.