Guess I've never had much trouble dialing in either carb, though admittedly the Edelbrock does take some thorough studying of the Edelbrock calibration guide. The main thing I like about the Edelbrock's is that once they are properly calibrated, they seem to hold the tune much longer then the Holley's. If I'm going racing or any kind of performance driving then it's definitely time for a Holley. Then I go for a ride with a friend of mine who has a pair of Edelbrock's on his blown BBF. Guess it all depends on which you want to run and how much time you want to spend learning to calibrate, then properly calibrating it....