Brian:
Hamilton Farm in Gladstone NJ has, I believe, the only one of it's kind in the world
From the Blue Tees (the back tees) Rating: 57.5, Slope 98
Needless to say, it is a complete course with 5 holes over 215 and none shorter than 125.
I'm told that length does play a factor and has prevented it from being rated from the forward (White) tees
Steve