Todd,
You'll get a lot of opinions on when to make the first oil change, but I think it's cheap insurance to do the first couple of them early.
My own policy is to change out the FF at 500 miles with a dino oil. Change again at 2000 miles. If the consumption has gone way down at the 5000 mile point, I then switch to a syn, and up the change interval to the factory recommendation. If it's still burning oil at 5000 miles, I keep dino in for another change. I believe changing to a syn too early delays normal break-in wear.
Go GC in the LS1!