741 Center Section question?

I think the Moparts tech archives has a pretty good info page on all the different rear ends out there. I think it was Dr. Diff that even posted all the info. He compared pinions across all the different manufacturers and explained how even though the different cases all have different pinion diameters they all still had a 90 degree step at some point which would be the weak point. Also there is the common point made that the 741 is still a thicker pinion than the Ford 9". Try this link, it should be the article http://www.moparts.org/Tech/Archive/axle/1.html.