[jgpnashville]

How did you determine it was too hot and how did you know you had vapor lock? I considered that, but the water in the radiator isn't unduly hot, so I was figuring it was OK. The heater hoses seem warm, but all heater hoses get warm, don't they? Since I don't have a water temp gauge, can I shoot a infrared thermometer somewhere and see if it's getting too hot? What temp would I be looking for?

I haven't replaced the thermostat or flushed the coolant yet. I'll go ahead and do that. I have new belts and hoses for it that I'll install while I'm at it and see if that changes things.

I guess I have lots to learn, but the truck is a lots of fun. Neighbors stop by and visit when they see me out working on it.