Hello just bought a Heater core box from a 1968 Dodge Monaco station wagon for $50. to replace the one in my 68 Chrysler Newport that was shot. They are almost identical in everyway except for the big circular metal vacuum that is on the original one i have towards the middle of the box. It has the mount for the outer one but not the second. This is for a non-ac car. Any help or past dealings with would be great.