Alright I've been outside all day working on my vehicles and I finally found the culprit in the defrost only crime. Behind the glove box in the passenger floorboard there is a vacuum box almost directly up against the firewall. Theres like 5 colored vacuum hoses coming out of it and the purple one was pinched up against another cluster of wires. I pulled the extra slack through and zip tied the cluster away and it works perfectly. So far easy fixes on this car and I'm doing the body work next week and going to undercoat the underbody cause the rocker panels are rusty.
