1967 to 75 A body rear end Drum to Drum

Will this fit my 73 Dart? I am new to the Mopar scene, my wife bought me my first one in my life for my birthday on Feb 14, so forgive me if I don't know all the specs, but do know from researching what I want out of my new mopar, the 8 1/4 posi is exactly what I want.