Em,
You should have all five files now. I opened the first of the five Word files and that is a VERY comprehensive manual on the 2100 carb! Tons of pictures, internal cutaways to show exactly where all the ports run, and a good description, too. The lead page says it was OEM for '58 through '75, so having a bunch of "extra" ports makes sense for those '70's applications. That carb is used by a lot of guys on Jeeps, replacing their stock carb on the 4.0 in-line 6, and earlier models too. Hope the book helps.