I need some help. I have a rather stock 72 other than a header and modified air filter. I have a problem with bottom end power. I recently adjusted the carbs, they were really bad before, and the car ran like a top. I didn't run the car for several weeks and when I ran the car, it had little low end power. The car is rather anemic untill it hit approx 3000 rpm and then it really takes off. I was curious if anyone knows what the problem could be. I was thinking some sort of ignition problem, possibly the vaccum advance? If anyone can shed any light on this subject I would be most appreciative.