The 1973-75 models of the 27 had the Galley located along the starboard side of the cabin, in 1976 the layout was changed to place the galley in the aft, starboard corner of the cabin. I actually thought 1977 was the first year for the change, but found pics of a 1976 model with the aft galley.
I have a few pics that I've collected of various 27s.