Anything above stub axle raises ride height. SSL advice is to stick with whatever gives closest to pre-installation regarding 20mm spacer and ride height, but I can imagine a situation where you may wish to increase in which case spacer is at the top.
It is a clarty job but the secret is to wear gloves, change regularly and don't be in a rush to finish. A full day should still be enough to complete both sides though.
ETA: nearly forgot to mention but be very careful re-engaging the fine threaded kingpin/oiler bolt into kingpin threads as easy to cross thread. Here a short tapered drift helps align the holes in various components the bolt has to pass through before it reaches the kingpin. Typically one side will engage on first attempt and the other will be a PITA
