well hers the bad or not so good news
Here's a web site and some information you might want to have for your fuel system and carburation tuning, the guys out of oregon and really know his s**t about the carbs and such,,, I ordered the carb manual and boy does it help. It says for demon carbs but it covers holley in general.
http://4secondsflat.com/Technical_Information_for_Ignition_and_Carburetion.html