No, he took the original tapped holes as a reference and mill perpendicular to their axis. He enlarged and tapped at 7/16-14 along the same axis.
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.