I set up a dual temp gauge system because I too did not trust the factory gauge. The factory gauge sending unit is in the engine block and the backup gauge is in the pressure tank. Once every thing gets up to temp they read about the same now that I removed the resistors (2) from the stock gauge.
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.