Hi John,
If you go to the website, at the bottom you will see Concorso Arizona at the bottom of the first page that comes up. Click on those words and the info will come up. When the second page comes up, start to scroll down and on the left side you will see registration. This should answer all your questions, but if not call me.
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.