Holley/Demon Carb stumble

OK now that i have vented.
Yes proform base,main and Demon metering blocks
I'm not going to condemn the metering block or that it has been modified.......I need to re check it all the next time it's apart. Pulled out all my pin vic drill bits and for an example i said that the emulsion hole were 29 and 25s.......I have a 22 31 and a 33 so don't know where that came from except poor judgment on my part.
Will be more diligent with the next measuring.

After thinking about your rich idle situation....... and the fact that you can get a .054” drill bit pretty far into the IFR....... if just doesn’t seem to want to come around....... I’d replace those with “fresh” IFR’s that were the desired size all the way through.

The length of the restriction is a factor(at least it is with jets).

After i turn in the idle mixture screws in about half of a turn(around 3/4 to 1 turn out) it idle just fine and there is no super strong exhaust smell at idle, like there was last night.
so i think i'm ok with with that....for now.

I wasn't able to drive it today but the stumble is still there. whack the throttle in neutral, primaries only no problem. To the floor and stumble. when completely heat soaked stumble goes away. In gear, in 3d gear stomp and stumble.

I'm really beginning to think the stumble is a RICH stumble, not Lean stumble. when i whack it to the floor, in gear, if i don't hold some throttle after the full throttle stomp it will die. Then i have to hold the throttle part of the way open to restart.