Overheating issues

Been dealing with a funeral recently, cancer sucks.
There's no heater core in the car. The original ac box from the 318 was removed when the 440 was put in. I do not believe the overflow is being vented, will definitely look at that later tonight. I'm picking up my radiator from the shop today, we'll see what he has to say about it. Will also look at putting a spring in the lower rad hose.
Timing is not something I'm really knowledgeable on, but will try to get a timing light and figure it out to see where I'm at.