The bolt pattern for the backing plates is different for EJ to HR. These will not bolt up to FE-EK stub axles.
From memory the way to do it is to use an EJ-EH stub axle & fit it to an FB-EK upright, the kingpin is the same diameter. Then fit that assembly to your FE.
The FE-FC kingpins are smaller in diameter, so you cannot fit the EJ-EH stub axle straight onto an FE-FC.
Dr Terry