@Larry. It is indeed an outside fuel door. Also, the scoop itself presses right up against the glass and sits very tight on top of the distributor, it's a snug fit. I suspect compromises were made to use the scoop...
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.