Jim,
St. Louis CC #2 counts. Don't forget that it is uphill to a huge biarritz green.
Those distances you gave are not a hard-and-fast rule, then. Lay of land can affect them. So can architecture. What about conditions, e.g. wind?
I haven't played Pacific Dunes. Just looked at a scorecard online though. One par 4 is 463. Another is 464. Darn close to 470. I know I've heard the wind can howl there. When it's in your face, can't those holes play a lot longer than 470?
Even if #2 at SLCC makes the grade -- and with a front pin it seems like it wouldn't -- the rest of the course must play real real short for the modern game. I expect a strong 25-year old will have wedges or short irons into all the par 4's.
btw, of the courses I know personally on your list, I love Riviera and Olympic Lake...really really like SLCC...was disappointed in Torrey and Bellerive. In the St. Louis area, I would choose Westwood over Bellerive any day of the year.