I did not notice if you mentioned your intake manifold, but please save some money and MATCH your intake to your carb! Buying a bigger Carb won't solve your problems (your desire for more punch) unless you match a bigger carb to the right intake manifold.

Obvously Robert found the right carb for his intake and cam setup, but slapping a bigger carb on the car is not the answer unless you've done alot of studying what you've got first. I bet you have the power right under the hood, right now, just need to check things out a little more.