RE: 64.5 Mustang Restoration Question
AFAIK,they had clips for the moulding, and there was no "landau" top option in 64.5. I'm betting the guy who put the "landau" top on didn't want to mess with the clips.
Have you removed the widshield, and rear window? There should either be holes, or pins that the clips slid over, and locked in place.
I have a very early 65 fastback, with some 64.5 carryovers (carpet stopped at the bottom of sill, vinyl up to the kick plate, slide in spare tire holddown, etc).