The worldwide de Tomaso registry had some good info on Group 4 Panteras and GT5s that might be helpful http://www.qv500.com/detomasoregistry.php
Mike
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.