Good morning guys.
I hate ignorant customers! A civil engineer with more letter after his name than is reasonable should know if he needs a map in NAD27 or NAD83. And he should know what that means!
In case any of you care at all here is a link that will tell you more than you ever want to know about it:
North American Datum - Wikipedia, the free encyclopedia
Our customer did not even know what a datum was. I would not expect most folks to know or care but a civil engineer that works at a survey company darn sure should.