What can a 7 1/4 rear take???

Oh wow. 70,000 on a 318 7 1/4? That's awesome! What kind of transmission are you running 73Abodee?

Just wondering if there is any useful information out there for 7 1/4 rear ends? I am looking for book specs AND real world experience from people who have gone through these little rear ends in order to learn more about them.