There were lots of difference between the three major plants when it came to "Buck Tags", build dates, etc... As Sam pointed out, there was no production during the strike. Also, look into ordering a Martti report for your '67. Lots of details there and worth the time and money.
Dave & Terri
'65 Mustang Fastback~Ivy
'66 Mustang Coupe~Envy
'65 Mustang Coupe, 302, 3 speed~Tinker
'11 Edge~Kona Blue, V-6, 6 speed
"What do you mean pay attention! I can't afford to pay attention."