I have a pair of C5ZF 18080 A3 marked rear shocks that I believe to be correct for a standard 66-69 Mustang w/o the heavy duty suspension. Feel free to correct this information if it is wrong. They will need to be cosmetically detailed, as you can see in the pictures. The close up is of the worse condition of the pair. The date codes on both are 6GA (if I am reading this correctly). $50 for the pair plus shipping from 28721. My email is in my profile.