Dredging up this old topic...
Having read the TSB that Jeff mentioned, I'd agree with it being a running change. I think that the TSB has caused some confusion though of when the running change occurred however. It also indicates the strips had been installed, but the running change was actually whether they were installed with rivets or not. This is supported by how the TSB is worded.
Based on the factory vinyl top 65/66 coupes I have owned or been able to examine closely, the strip was present in all of them. My current coupe is a late '66 Dearborn car with a factory vinyl top, strips (though they're long gone), and rivets. Again, based on the TSB, I believe the strip being riveted in was discontinued during late '67 or early '68 production. Problems with the strip coming loose prompted the TSB to instruct they begin riveting them again.
Here's a link to read the TSB: http://www.fordification.com/tsb/viewtopic.php?f=2&t=602&p=613&hilit=vinyl#p613
+1 on this understanding ^^^, I would be willing to contribute that AT LEAST UP TO EARLY NOVEMBER 1966, San Jose was still using the early, FULLY RIVETED DOWN (ALUMINUM?) STRIPPING, not yet using the version that the TSB is discussing, which is the "Snap-In" stainless steel version and is NOT sealed over the top so the stainless trim is fully visable (again, the LATER version is stainless steel)
The 1967 Interior Assembly manual has this same engineering number shown to fit '67's also.
My 11/2/66 built 67 Coupe had these on it and I have lost them along the way (though I thought for sure I had saved them)
It would seem I felt the later, or what I might call 'the 68 version' was what I must have initially preferred before choosing to do a more Concours restoration because I have a pair of those in my spare parts, they are the stainless steel variety and the ones I have are not kinked and not drilled (as per the TSB)
I suppose I should use what came on my car and offer these to another who has the later version.
I could use ideas on how to procure a good used set or manufacture a reproduction set.
PM me if interested in the stainless version