I think the crux of the ask here maybe in the fact that Les (Guitarman) has one of the 14 original Group 4 factory race cars and likely wants to remain authentic in that rebuild.
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.