I put the belts on and they are tensioned and working well. The car overheated after 20 minutes of running in the garage and pushed out .5 gallons of water through the overflow. I waited for it to cool down.
I added distilled water to top up the coolant tank. The fans didn't come on so it's something to do with the cooling relays or fans. I tried my relay (the big one) in another car and its fans all worked fine. I then went back to my car and checked the fuses for the fans, #10 and #15. Both were blown. This must have happened when the wires were pulled in to the alternator and shorted out so I replaced them with another pair of 25A fuses. I turned the car on and same thing. No fans, car heats up.
Next is to check the fans actually work and the wiring and thermistor. More later.