[Gaz64]

Technically if the mixture screws are at a base line setting, the airflow per barrel is adjusted first, while keeping the engine at say 1000, adjusting linkage as necessary to have all barrels flowing the same. The mixture screws alter engine smoothness, and each cylinder can "go away" with too much one way on the screw, and although there is air flowing though the mixture discharge port, the adjustable volume doesn't make significant difference to a synchrometer reading.

Get the carbs balanced correctly at idle, and check airflow balance at part throttle of 2000 or so rpm. Once balanced at idle, the carbs should be checked for mechanical balance at wide open throttle with the ENGINE NOT RUNNING.

Good baseline tune, good linkage, easy to adjust, can you give EFI smoothness.
I built a 2.1 Pinto a few years back with a pair of 44 IDFs for a friend, and even with a 250 @.050 cam, it had virtually no cam lope. I should have went up one grind.

Gary