All the JB has to do is keep the nut in position and not spin . I was going to put a backing washer against the FW and then the nut. Tighten the bolt and then JB them to the firewall. But I like your suggesting of welding a stud in the hole.
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.