'68 Barracuda Notch

I checked both fuel float levels and they appear to be where they should be. I tried to adjust the idle mixture screws as best I could, but the idle is so erratic that it makes finding the highest RPM very difficult. It jumps around 10-15 rpm just sitting there. No matter what I do, the idle just doesn't smooth out. Could my cam be too aggressive (I have no idea what's in there)? The accelerator pump seems to be functioning. My initial timing is around 13°.

What is the idle set to? I used to have one that sounded like a popcorn maker even idling at 1300. I ran it with a 4500rpm stall speed converter. Could be that you have too much cam and that would explain a lot of the issues you are having. The other explanation is that you have a nasty vacuum leak.