I had a couple of problems getting the coolant system to work right. First the radiator fan wouldn't come on. It turns out you need to ground the green wire that goes into the relay in the chassis wiring harness. It is the green wire with the yellow wire nut in this picture.
So then the fan came on once the engine warmed up to 195 degrees. The problem was then that the engine didn't stop warming up. I had put as much coolant as I could in the fill cap. I think running the engine pushed around some air in the system though. Then I opened up the fill cap, was able to put more coolant in and for good measure opened up the driver's side petcock on the radiator and filled through a tube there until the fill cap started to over flow into the over flow tank. This is what the radiator petcock looks like that I am referring to:
Now the engine doesn't heat up past about 205 degrees which is a good operating temperature.
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