Darn. Maybe they will chime in. Thanks!
Being a Harrisburg native, I haunted Francis For Fords constantly during the '60's Shelby era. I saw my first GT 350 there in November of 1965 (6S101 - See photo, that's me sitting in it).
Francis did not do much Shelby advertising but I recall an ad they ran in the
Patriot/Evening-News, Harrisburg's daily paper, in early 1967 advertising a batch of '66 GT350H's that they had bought out of the Hertz disposition program. I recall that ad included a photo. This may give you something to search for.
The iconic photo of the '66 350's lined up in front of the Francis showroom appeared in the July 1966 issue of the east coast drag racing magazine
Super Stock & Drag Illustrated, as part of an article on the construction of the
Turbo Stang, a Turbonique powered '66 Mustang fastback exhibition drag car, which Francis sponsored. I was the one who dug this photo up and originally posted it on SAAC Forum I. It got picked up by various photo sites and is now in general circulation. I have been told there is a color version of this photo, but I have never seen it.
I visited Francis around the time the photo was taken - that is a real R Model at the center, it was on a nationwide tour of Shelby dealers at the time. I encountered it parked parked inside the service department one Saturday and was able to give it a good looking over.
If anyone has any information regarding the whereabouts of 6S101 or the Turbo Stang - I would like to hear from you!