73 Duster front drum to disk conversion

On a 73 you should already have the large ball joint upper control arms.
Are the front drums finned or ribbed? I believe those only came on the 73 up large upper ball joint cars.
Spindles, caliper mounting brackets, calipers, dust shields, master, distribution/proportioning valve/block, hardware, etc. from any 73-76 A, 76 up F,M,J or 73 up B.
Remember these replacement brakes are large bolt pattern so you may want to consider changing the rear to LBP as well.