Not an expert at this.... 100-200 RPM max.
But that is what I get on stock vehicles at worst and my wife’s [email protected] cam in here 360. Performance cams, even small ones may drop more but I don’t think it should if the right converter is in there.
Yeah, my buddy thought no more than 200 also. I don't have access to something to compare it to. The higher idle in park required for a good idle in drive is uncomfortable. I guess its coming out.