I respective disagree with Randall on this one. I would not start on the carbs until I have set the tappets cold at 10 thousand, the points at 15, new champion plugs @ 25, cap, and wires. I would then right before I tried to start it make sure the carb pistons fall smoothly. If they fall smooth and it starts, and the idle is not off the chart, I would check that the timing is not being pulled over by a shot vacuum advance. In short, I would not start messing with the carb settings just yet. In my view, they come later in the food chain. But having said all that, it would not surprise me that the high idle is a stuck piston in the carbs or perhaps low oil in the dash pots.
steve