Tranfer Case front out put yoke nut
 

Guys,
I had to changed the out put yoke seal on my 1968 GMC 4x4.
It has a rockwell transfer case what I need to know is the torque that I need apply to the yoke nut when reinstalling the front yoke.

Any advice?

I have a Haynes book that lists
NP203 - 200Ft-lbs
NP208 - 120 Ft-lbs
Dana - 150 Ft - lbs

But it does not list the rockwell?
Thanks in advance.