Ok, I'm the paranoid here but what I do on suspensions I've learned from race car builders. For the bottom, car on the hoist, pass a string/line through the centre of the car front to back. Measure the track to your line on both sides to get a good understanding of how off the suspension mount points are (if off at all).
For the top of the strut, Nissan has on their workshop manuals a series of measurements to be taken of the bonnet. If they have it for the bottom, I've never seen it but it'd be a lot easier.
Knowing both top and bottom allowed the mechanics to push and bent the chassis until things were 'square' as they said.