I'll give you a little hint, IT DOESEN'T MATTER... as long as the measurements can be met. XYZ is = ZYX I like to show people how to use "Common folk tools" so they can actually understand what is happening, and in due time do it themselves with a $60 Camber caster gauge. you can get close enough measurements with a level and "measuring stick" but a gauge does save a lot of time.

Learn to fish.. or listen to the other posts on here and buy a fish.

Jeff