Correct heater hose routing and ground strap placement
Not sure if this helps - but - for a 66 dart the two hoses were routed over the passenger side valve cover, sort of close to the carb. Not sure on a 65, if someone has a FSM for a 65 the routing might be in there. I know the FSM's from 65 to 66 changed alot, the 66 FSMs have a ton more information in them.