Check the Duratec website to learn how it's threaded, it's going to be very hard to tell just by looking. Odds are that it is English threading, but it certainly does matter. If you try to cram Italian threading in an English BB, you're going to ruin your bike.
You shouldn't have to measure anything; if you're running regular track wheels, you need a BB with a spindle length of 107-109mm. The Dura Ace Octalink 109.5 bottom bracket is their "track" size, but you need to buy Dura Ace Octalink track cranks in order to accommodate that, and those cost a small fortune (like $260).
You'll be much better off buying a cheaper square-taper BB and cranks. Sugino 75, Miche, or even some of the less-expensive Shimano and Sugino 165 offerings on eBay on from your LBS.