There are so many variables with an edelbrock carb that can be altered by changing metering rods, springs,jets & squiters that allow you to fine tune your carb to accurately match your engines power curve. This makes it a highly effective metering block when set properly but having extra variables in this manner only makes it more difficult to set. I knew next to nothing about carburetors when I bought my first edelbrock. By the time I educated myself & got mine running properly I felt confident that i could probably handle just about any carb out there. I would suggest you read the edelbrock manual. That is a great source for carb theory, understanding & maint.
http://www.edelbrock.com/automotive/eps_intro.html