This is a good used cross-member that carries the differential.  Also known or called the rear differential cross member. 1966-1980 Silver Shadow & T-series This photo is for reference...

This is the differential pinion oil seal. 1966-1980  Silver Shadow, T-series, Shadow II, T-2, Silver Wraith II 1981-1998 Silver Spirit, Sliver Spur, Mulsanne, Turbo R, Pre Arnage,...

This is a New torque arm. 1966-1980 Silver Shadow I,II, T-1,2

This is the torque arm mount. They are 2 of these per car mounted above the other on the front of the torque arm. Sold Separately 1966-1980 Silver Shadow I,II,III, T-series, Silver Wraith II