Dan,
Don't know much about the Southwind except that it was probably one of 3 most splashed boats from that time. The v-bottom I mean, not the tunnel. Great looking boat, worked great and was fast, what wasn't to like about it? It was no wonder when it was coppied so much.
Last year there was a good discusion about Southwind either here or over at Banderdog and the guy who knew volumns about them and Phil Percivel was Jack Mc over at MPD. He's the guy you need to get a hold of and pick his brain. He's got some GREAT stories about boats, their builders, and racing. Now that I think about it, it must have been at Banderdog, I've never seen Jack post over here.