I'll admit to being unfamiliar with that carb. On a Holley, the condition is consistent with a lean condition. It may be setter addressed increasing the shooter size, rather than messing up your cruise mixture ratio.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.