My s/n 1744 has a fiberglass wrapped tank (no drain plug). It was built in June of 71 but never sold until a year later. Probably sat in Long Beach having the mods done to it.
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.