Heo,
It wasn't too common to do it on the '67s, and I never saw one. But I did see several 65-66s with that mod back in the day...
. Btw I grew up in So. California. 
Regarding the sequential or "walking" tail lights, I was sitting at an intersection waiting to turn left the other day with a work colleague who is quite a bit younger than I am; we were behind a new Grabber Blue Mustang which had the sequential tail lights going... I brought the feature to his attention and told him I first saw it on a '66 T-bird. He seemed amazed that the idea was so old, and had not just been invented! I guess that's human nature!
Can you post that old picture?
Bruce
Bruce, i dont have a scaner so i cant scan the pic
and tried to take a photo of it but not good enought
camera.
Abuot T-bird lights ,A friend was on the anual techinspection
with his 71 T-bird and did not pass.....They told him he had
some bad conection to the turn signal beacuse they were
flashing iregulary

He tried to tell them but...Yea right nice try but im not buying it
I have never eard of a car with that, Go home and fix it