I want to thank you folks that encouraged me to dive into this heater box because I really had cast it aside as a lost cause. Core actually cleaned up and pressure tested fine. went ahead and had him powder coat the box parts too. Got a variable dc bench power supply on order to test the motor and other parts too.
Well done, and congratulations on feeling good about rescuing a project in this "throw it away, disposable" world!! A true hot rodder!!