That diagram with the pressure cap removed is not a TSB mod. A correctly set up cooling system in the Pantera does not require all those hoses. The system needs the correct Cleveland thermostat / block fitting, water pump, and radiator.
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.