Thanks PeterAllen,
You are right. In my case of LHD, the pan hard rod configuration is reversed.
The rod attaches to the chassis in left hand side (driver side) and attaches to the axle housing at the right hand side which is the passenger side.
I re-measure the side movement with the help of my son, I confirm now the front axle is moved to left hand side at 1". (or the chassis is moved to right at 1"). (My left/right is defined as when you are sitting in the car.) My calculation is if the car is raised by the air spring, the chassis will move towards right side further due to the attachment point of the rod to the axle is at right hand side and leave the axle movement shifts further to left hand side and increases the already 1" move (at bump stop). I hope it will be corrected when the new springs are installed. I hope the workshop didn't install a wrong hard rod bar. I really want to make sure everything is correctly done before installation of the new Arnott air springs as I have enough problems with the P38A lately.
I want to get it run healthily again.
Thanks!