The dash is now in, the engine now runs on all 8 cylinders, and the AC is freezing cold and blows out all the vents! Total success! Well, mostly... I bent a pin on the airbag control module and I think that’s causing the airbag light to turn on. Usually the airbag light will flash to indicate a fault, but in my case it’s solid. Next steps are to repair/replace that module, install new O2 sensors, install a new fuel pump/filter, and possibly find a set of leather seats to swap in.