Unfortunately though we lived in France for two years and have returned every two years since 1993 we didn't have the location of the feif (pronounced with a long e as in thief)until our trip four years ago and our 2005 was to attend a wedding in the Loire Valley so... don't know which Sicards the street is named for. If you haven't already done so, go to Albi! We have travelled through most of France and it is among one of the most picturesque places we stayed. It also has archives---closed when we went---with Sicard records.
Regarding your Sicard de Carufel ancestors, do you have the date of Amanada Zoe LaPlante's birth and marriage to Desire Sicard? Which of their children are you descended from?