Hi All,
Looking for some help with a COPO designation on a build sheet. The car is not a 69 Camaro  

 but a rare car from what I can determine and is in great original shape, numbers matching.
 
1973 LS4 Malibu 
Please review the folloing build sheet and let me know your thoughts on the COPO on the build sheet and what it may mean.
 
73 Chevelle Malibu Buildsheet 
Thanks,
GearheadMex