I have that same book. It's a little dated, but most of the info is still applicable and relevant. One of the biggest changes is removal of lead, such as used in galvanized collecting buckets, and in the solder used to fabricate the pans.
If it were just me wanting to try my hand at making syrup, I probably wouldn't worry as much about the lead. But if you intend to sell or give the finished product away, then that's another story.
If you want the "bible" of syrup production, this is what you're looking for:
http://www.massmaple.org/manual.php
