Isn't this really all about being consistent in what WE do, and providing a
key so what THEY did can be understood?  I grew up on metric, use
engineering, but report it all with notation of what it converts to in
English.  If arpents are mentioned in the ancient sources, I give
conversions so people today can grasp it.  If the builders uses cubits then
I figure out what the modern measure that I use to record converts to in
cubits.  Is that so difficult?  (not really)

Dan W.