Depending on the complete engine set up the modman works well with different degrees of success depending on port size and engine demand.The standard port works best with two 750 Edelbrocks and the max wedge port works best with two 800 cfm Edelbrocks.They seem lazy with a single carb and take some tuning with the 6Pac set up.
On a mild street engine two 600/625/660 cfm carbs make it very drivable.