[Kenth]

Your carb should NOT have the idle adjustment screw on the side of carb, it has been added by someone not knowing that idle speed is set with the large air screw between the idle mixture screws.

Remove the side screw and set idle speed to 600 rpm with the air screw (500 in drive for A/T) and start with the mixture screws 2.5 turns out from lightly seated and adjust for best vacuum/rpm, reset the rpm and finally check the mixture screws for the same amount of turns out for both when finished.
All settings on fully warmed up engine, choke off (and in drive A/T).