Peter
That hole is totally gone. If you look past the green in this picture you'll see a chute through the trees and an uphill fairway. #3 tee box was just to the right of the green and played as an uphill par 4. In the late 80s they combined those holes and made it a par 5, along with a few other holes they modified and added. By my recollection I think only 11 of the current 18 are original Stiles hole, including #11 where Ben Hogan closed out Mike Turnesa 8&7 to win the 1948 PGA Championship.
Of all the holes I've heard older members reminisce most about it's #2.
By contrast, I believe all 18 on the shorter (6000yds) East course are original.
There is a map of the original design, including a 9 hole South course intended for ladies play that was never built, on the Wayne Stiles society web page