runing out of idea´s on what to improve

Are combos are pretty close, If your looking at chainging the carb mine made the most power and torque with a Holley 950. My home built carb made the same hp but about 5ft lbs of torque less. I also saw a average of 15hp gain with a 1" HVH super Sucker spacer. The gain was only 1hp at peak but it made a good differance in the mid range.