Nice, I have noticed that I am far stronger since starting a job that has a physically demanding component to it. Getting back into rock climbing regularly has helped, too.
While doing some organizing recently, I came across an old book of mine, one of the very first running books I picked up. It is a compilation of event-specific workouts from top high school and college coaches of the '70s and '80s, edited by the legendary Bill Bergan. Let me know if you are wanting some mile workouts, I could look them up and post here.