Well he drove the truck by Area 51 today. It idles pretty rough. The T stat is stuck open so it never gets hot. The fan clutch is frozen. It runs ice cold. I never did a lot of work with the feed back carbs. He is going to replace the t stat and replace the clutch. He is also going to replace the O2 sensor and fuel filter. I'm thinking the carb is stuck in a cold loop. But as for the rough idle once we get the thing to get hot. It might fix part of the problem. Next I suggest we look in at the jet valves and an elimination kit, carb and header. Any other ideas?