Help with suspension

Are 70 duster with the factory disc brake assemblies different?

70-72 Dusters would be small bolt pattern and could be either disc or drum.

Drum Brake LBJ Moog #'s K785 & K787

Disc Brake LBJ Moog #'s K7021 & K7023

The Tie Rods are the same whether disc or drum 70-76 Duster.....

Could they have sold you the LBJ for the 73-76 Dusters??

Moog #'s K781 & K783