I've been running my shrouds in the 3rd hole from the bottom, too - but I have a 1998 boat and a brand new jib (cut differently since 2000 to allow more mast rake).
How old are the sails? (I know the boat's an '84). The jib could be your limiting factor. There are a few tricks to get more rake with an older jib (pin the tack through the adjuster (not on the bow of the shackle), raise the tack on the adjuster, run the clew shackle through two holes on the clew plate (bow through one and the pin through another) and hang the blocks from the sides of the shackle).
In that kind of breeze on Austin Lake (no real waves to speak of), I'd be travelled off maybe 6" - 8" on the main and probably 1/4 of the way out on the jib (to keep from backwinding the main and counterrotating the mast). Play the main traveller in the gusts (works best if the crew can do it). Double trap, weight forward to keep the bow down.
What's your helm like? Rudders aligned & raked properly?
Lots of mast rake will bring out the rudder gremlins in a hurry.