Holley 4779 750dp question

Ok, so you set your idle mixture to maximum vacuum, if I read that correctly. Just as an experiment, try turning the idle screws out to 1.5 turns and go for a drive to see if that does anything. Does the ~2200 rpm surge get better, and does taking off lightly from a stop seem to improve?

Just as Rob said, what is the initial timing? Also, are the floats set to the correct level?