Dan -- the pro's scored slightly better this year than last year at Oakmont. Winner was two shots less...63rd place was nine shots less...median from the top 63 was about 5 strokes less. I chose 63 because that's how many made the cut in 2007.
This by itself suggests that whatever Torrey's rating, Oakmont's should be harder. I know they did not play TP at full length each day (or any day?). But wasn't that true at Oakmont as well?
The guy with the 8 index shot 114 at Torrey -- probably in conditions that were a few shots easier than U.S. Open setup. To me that just about proves that even with a CR of 80, slope at Torrey should be 155. I don't know about the adjustments though.