Brake booster rebuild kit for Duster 70

Midland-Ross boosters are easier to take apart (V-clamp). If Harmon has the parts, that is great since very hard to find. Many here use Booster Dewey, but not cheap.

Can be confusing since they varied. I once tried swapping the rear plate from the booster for my 65 Newport to a 74 Dart booster. Both were M-R, same diameter and looked almost identical. I just needed the bolt pattern on my 65. But, didn't work since the piston hole was a different size (smaller, I recall) on the 74.

Most 64-72 K-H disk cars I have seen have the small diameter dual-diaphragm booster. That might be even harder to source parts.

If you don't care about original, there is a new booster/MC on ebay for $130. It uses a GM booster, but fits your Duster.