Failed 40+ year old system was quickly diagnosed and unfortunately was clearly past the point of repair. New system was fabricated and installed two days later,, and, nuisance vibration issues with furnace ventilation system were corrected to the delight of my wife and me.
Installed a 96% efficient Bryant furnace
Installed a 2.5 Ton Bryant air conditioner
Installed a 3 and 1/2 ton Bryant air conditioner