Call 800-FORD-SVT (800-367-3788). They will ask for the last 6 of your VIN and can give you the build date and the build number as well. You can buy a build certificate with that info on it as well.
CEG current update: We plan to start the migration on Nov 11, lasting through the weekend. CEG will be down during this period.
We're switching to xenforo.
I had 8 Explorers over the years and decided to go a bit smaller but wanted something fun. This fit the bill.
Haven't tuned it yet but it's on the list.