Holley 4779 750dp question

He is not taking cruising, he is talking power. You know better than most that he needs to be able to handle the fuel he is giving it or he won't get power. As far as I know, that carb never came factory with 71 and 80 jets. Someone jetted it down in the primary and up in the secondary. Better cruising mpg and more power when stomping on it. Pretty common. The OP jetted it even larger. To get the value of that fuel, the ignition system has to be able to burn it all. If it can't, it's pig rich and no appreciable gain in power.