I tried to read the part numbers off of my spindles/steering knuckles. If your lucky you can read 3 digits maybe 340_ _ _ _ from the forgings. I believe an an A & E body disc brake spindle would be 3402628 for '73 to '76, which is shorter height wise than a B body disc spindle 3402640 by at least 7/16". The spindles on my 67 Dart were the taller B body spindles. So, I searched for a set of later A/E body type spindles and now have them. In checking my lower control arms, the drivers side control arm seems bent back. See photos. So, I bought a set of E body lower control arms with a different position sway bar tab. They were mounted inboard more so the disc can be mounted to the front of the rotor. Mine (presently) is toward the outer arm and has the tabs at the bottom end of the control arm. So, with the Jersey monsoon season in full swing, it's been difficult to get work done on the car outside. At least my car has gone green, with all the rain and not using the car. And I'm saving so much money on gas (now $ 2.03) up $.25 from last week, but spending 10 times as much on new (old) parts.