Axle Identification help

Hey guys,

please be patient with me, very new to all this, eager to learn.
So I am trying to take a look at the 73 charger I bought, and identify parts. I found out it has a 78 440 truck engine from the stamp pad, havent been able to get under to look at the tranny #s, and am now trying to figure out what kind of rear axle I have. It has a 12 bolt cover, if I am reading correct on websites it sounds like its a 9.25, is this correct or do I need a P/N of it? Thanks a lot guys
Author: timmymacnj