I found a good article in the PCNC Newsletters
July 2009 page 8. it only gives the range of 275 to 400 ft-lbs.
I would think a light coating of grease (or anti-siez) would aid in future disassembly.
during torquing I would be looking for the transition in torque applied when the two inner diameter races clamp down on the spacer, being sure the deformation caused by the locking nut does not give a false "click out" on the torque
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.