This problem has persisted through three water pumps so that is not the problem. It has good flow out of the head to the radiator. I use only NGK BP5EY V-Groove plugs and have since they first came on the market in the late 70s/early 80s so their heat range is not the problem. My timing is on 0 TDC right now so that is not the problem. The new High Compression head still pings when the motor is hot just like the old head did. I am using a lot of octane boost but it still isn't stopping the detonation when I give it much throttle, just like before.

Now, one person has said that they used the same carb and they had a similar overheating problem, just not as severe. The Holly/Weber has to go.

I am going to go with a fuel injection from a Sentra instead of another carb. It just makes more sense. Later I can add another throttle body to it. I do not want to use the port injection. Why? It only has one small port opening and very much restricts the amount of air that is available to the intake system. I want more air. More air means more HP. More HP means more fun. That is the reason that people use twin carbs, it lets in more air to breathe. The FI will regulate the amount of fuel in to the air much more good than a carb can. Right?

Mareo