67 Dart KH front disk clunk

The other day I noticed a clunk when applying the brakes while moving forward slowly.

Front suspension is mostly OE (52 years old) Upper ball joints replaced less than 1 year ago., Tie rod ends replaced in last 10 years, idler arm replaced 1 year ago. (Front suspension needs a rebuild)
Car drives straight,

I haven't looked into it yet, just wondering if it is a common issue others have encountered.

• Clunk seems to be coming from right front
• Can be felt in pedal
• Can be felt in body
• Can be heard
• Only happens moving forward
• Not noticeable at speeds

Things I will be checking

• Exact location of noise
• Supporting front suspension and trying to duplicate
• Hanging front suspension and trying to duplicate.