When a new acquisition turns out better than you thought.....

I have a 3.55 chunk that has a clutch type SG in it, I don't know how tight or loose it is, I'll have my axle guy test it unless someone has a suggestion....
I suppose that I could set it in a vise and slip axle shafts in it with a friend but how much resistance is normal?
I have a bounty of 3.23 chunks.
Clutch type are rebuildable... Throw some clutches in it.... Or, realizing this isn't intended as a performance build throw a 3:55 open diff in it...