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Message: <blockquote data-quote="kingb1973" data-source="post: 355994" data-attributes="member: 5649">RC92234,Looking at the pic of the valve cover you posted, looks like you may want to look at diagram 3-16A.Here is a link to a previous post that has some vac diagrams for 71-73.<a href="https://www.7173mustangs.com/thread-vacuum-hose-diagrams?pid=246021#pid246021" target="_blank">https://www.7173mustangs.com/thread-vacuum-hose-diagrams?pid=246021#pid246021</a>3-16A does not show using valve #5 for a 73-351-4bbl-AT. Doesn't show any of the check valves or an ambient temp switch either, but your engine feed harness should have 2 additional wires branched off with the oil pressure lead to connect valve #4. I have pics of a feed and the harness that shows items 10 and 11 if you need.As far as the loop(s) on the firewall, is it possible you have a part that has 2 - 2 post loops in a single piece? Have attached pic that was taken off another post on this site.<a href="https://ibb.co/0MQGxWL" target="_blank"><img src="https://i.ibb.co/VS3qshG/vacuum-connector.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>Curious now. Do you still have items 10 and 11 installed? Never seen those in real life with the 2 piece spedo cable. If not installed, then valve #4 may not matter?</blockquote>

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