A flat plate sitting a few inches above the carbs on stand-offs was the factory Group 4 set-up.
You can just barely see the plate in this picture (from one of our Facebook photo albums).
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.