Hi all
I have a Holley 3310 on a 440 with manual transmision.
I,m triying to adjust it with no many luck for the moment
If i turn the idle mixture screws all the way in,the engine not only does not die, but the revs goes up 300 rpm or so.

I squared the slots on primaries&secondaries to expose 0.030" or so.Also had a very high fuel bowl level but this has been corrected.

Rough idle fluctuating around 500 rpm or so.

What could be trouble?
Thanks in advance.