See techinspector's comment above, re: web site with a pdf of the tuning manual. The Edelbrocks are a snap to tune and modify. Most metering rod and jet changes can be accomplished in a matter of minutes. The tuning manual has a graph showing conditions and giving the part numbers to change rods and jets.

One word of advice - buy a new gasket for the top of the carb in the event you have to change the jets.

Good Luck,
Glenn