Fuel mix for my 69 Camaro L78

[moparts]

JoeG I tend to agree with you on the street use for the AC plugs. Especially on the lower compression engines and lower octane fuel. Lower octane burns faster and eaiser, lower compression doesn't squash out the flame.

The higher the octane fuel and the higher the compression just makes you have a better spark to set it off.

The day we run robs engine one of the first things the guy told us was he could make the engine get 5 to 10 more hp with good plugs. We thought he was full of it so went ahead with the ac's we had in it. The plug couldn't make that much difference right? Wrong, you know how Missouri is (The show me state).
When we were running robs engine on the dyno we wondered why the guy running the dyno kept asking his wife if the engine was missing. With the noise of the engine and fans running you couldn't hear anything like a miss in the dyno rooms. I went back in the building where his wife was working and bingo I could hear the miss as plane as day. So being from Missouri we run the valves, checked the carb, and made sure we had good spark. Still the same miss at about the same rpm. Finally after we were about to give up he spoke up and said some good plugs will solve your problem. So we finally said ok,,,show us. 15 min later new ngk's arrived, installed, and engine runing at 6500 rpm full load and no miss and there was about 7 more hp showing on the readout.

Got to go now...just wondering how do I get this starch out of my shorts?