This is the bypass hose between the header tank and the water pump.   1966-1980 RR Silver Shadow I, II & Bentley T1, T2

This is the heater tap. Note: You will need the o ring (XB6203) when replacing the tap 1966-1977  Silver Shadow, T-series, Shadow II, T-2, Silver Wraith II  (VIN# 1001-26708) 

This kit converts the Silver Shadow I suction throttling valve to a Silver Shadow II - type POAST valve This is an electronic modification kit to replace the original suction throttling valve...