81 Catalina 38 '''' Sparkman Stevens
Not to confuse the issue with too many facts, but there is a Catalina 38 made in the early ''80''s that was designed by Sparkman and Stephens (at least the hull was.) I came across one during a race here on the Chesapeake a few years ago. It was ghosting along next to the boat I was crewing on close enough for us to chat for a bit. The C-38 crew made it clear they were there for the beer. IOR influences in the (pinched) stern as described in the first post. Not sure how this S&S design made it into the Catalina line up either.
This model is not to be confused with the WAS (wide ass stern for the uninitiated) of the newer C-38''s or 380s or whatever they are called.