1968 340 AVS 4425S carb problems

I was reading that thread, our car had similar problems like not a steady idle (only sometimes when it warms up then after moving it goes away most of the time), runs great at full throttle, and the plugs appear to be clean. We adjusted the screws similar to where he was when they figured out the problem, that helped ours but we are still running into the surge like state department above.