A-body upper control arms

[66340SEDAN]

Can anybody tell me if there is a difference between upper control arms from a 1973 plymouth duster and upper arms from a 69-72 a-body. Both cars had disc brakes. I am putting them into a 1966 Valiant. I have a complete large bolt pattern disc set-up from a 73 duster but my upper control arms are rusty. I have a nice pair from an earlier a-body that had discs (69-72), they look the same. Are they interchangable? Any help would be great!! :thumbup:

 

[EvilScamp]

73 and later upper control arms have a bigger ball-joint.

 

[MileHighDart]

73 and later upper control arms have a bigger ball-joint.

Exactly !

 

[redfastback]

if they are rusty, pop out the balljoints, ca bushings and get them blasted and powdercoated or just painted.