273 Build

Hey, I just noticed something. The part number for the intake is for a 66 with CAP (Clean air package). I believe the car was ordered by a young man in the service stationed in the NW. (Washington/Oregon) but the car was made in
Hamtramck. Any ideas?
...I had a 71 challenger w/CA emission code & a Hawaii inspection stckr. on the rear bumpr.& it was also built in Hamtramck! . I think when production on a cirtain model ends ends at a cirtain factory & one is ordered after that date, another factory gets the order