There is a Pantera owner on this forum (Chris ?) that spend a ton of money on a MME motor for it to fail after a short time. He spent months fighting with Mark M and the valve train geometry was finally diagnosed as the problem ( by the manufacturer).
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.