Running rough. Any Ideas?

[OrangeAnimal]

I have a strange problem. I decided to spend some more time looking into why I can only get 12mpg. I have check my timing and a few other things. Here is what I found.

At 1500rpm the engine starts running rough random missing. It's hard to tell but it seems to smooth out alittle as the rpms increase. It's the worst right around 1550-1600 rpm. I tried changing the timing to see if that made a difference it did not. I am running a brand new Edelbrock 1406 on the engine. All the ignition parts are new as well. I am thinking it's the carb cause it is so precise as to where the engine runs rough. I don't have a pressure regulator on the carb. I guess it could be over powering the needle and trying to flood but it doesn't smoke or smell really rich. My dad said something scary it had to do with the camshaft but I really don't think that it the issue either. The whole program only has about 600 miles on it and I broke the cam in at 1600-2200 rpms for thirty minutes. Any suggestions on the metering rod and jet settings? Any help is appreciated. Thanks.