Ok. let's try something easier but on the same topic. After sifting through my spare parts boxes, I found an interesting grommet Mopar PN# 3431279. It has 2 small holes in it which i think would be perfect for passing 2 vacuum hoses through the firewall. Could someone verify that this is the correct grommet to use on Strato Vent systems for 1971 B body Plymouths?