Check it out, 1974 1st annual Americas Cup Land Sailing poster.
I bought this at an estate sale along with a 2nd annual poster too, both are listed on ebay.
make me an offerhttp://www.ebay.com/itm/251620319024?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
There are a few pictures of the event in this album. I was there with my family. My Dad raced in class 3. His boat was made out of 2 kayak bottoms. sail # US 27. - groups.yahoo.com/neo/groups/2nalsa/photos/albums/1866798299