I have owned several of the edelbrock carbs and they are never set up right from the factory. I always take them apart and make the neccessary corrections before attempting to use them. A few have been close to being right, and some have been off by a mile.

The floats are easy to set up, but it takes a few tries to get them set in the right spot(s). Keep in mind that there are two adjustments to be made per float.

It's worth the effort though since it makes the engine run all the better, the engine won't want to die when you come to a fast stop or make a sudden sharp turn, and you probably will never have to mess with them again after they are set.