Ok, I admit you know much more than I do regarding heads and deck heights etc. I'm on here because I need help and am confused by guidance I'm getting locally. Let start over. First, I do not have $2400 to drop on new Edelbrock heads. Here's the problem statement...
I currently have a 400 out of a 1974 which I had Dyno'd at 220HP. The same 400 block in a 1968 Bird produced 320HP when I ask how the 68 was able to achieve more horsepower without Edelbrock aluminum heads I've been told they had different heads and cams. As we all know things changed by '74 and the government had restrictions. What head, cam combo can I use to get up to 320HP without using Edelbrock Aluminum heads or milling.
