<VV> differential question

[John McMahon]

I've got my differential out for repairs ('65 manual), and I'm wondering 
about something.  How much resistance should there be when turning the yokes 
in opposite directions?  I can't do it by hand, but I can put one yoke in a 
vise and turn the other one using a breaker bar.  This still takes quite a 
bit of effort, maybe 20 ft. lbs.  Enquiring minds need to know before 
putting the differential back together!  I have never driven this car, so I 
don't know what it was like on the road.

Thanks,

John McMahon
1965 Monza coupe w/4speed