I am guessing 35 pounds torque (maybe less) to secure it. More important is sealant on the threads such as Permatex #2 or teflon tape.
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.