<VV> How do you ID a posi diff.? Proper torque for yoke bolts.

[John Trischan]

I am going to replace the diff. yoke seals in my '65 Corsa.  I looked in 
the shop manual for the proper torque on the yoke attaching bolts, and 
all I found was in the specifications, rear axle section, "Drive spindle 
yoke nut 100 ft. lbs." I know it says nut, but is this the correct 
torque, or am I missing something? Also, is there an easy way to ID a 
posi diff.,  do vair posi units need the posi additive?

                                                                Thanks 
in advance,
                                                                                
John