Hey Ron, I spoke to the owner a while back before he made the swap. I don't believe it is a widened tunnel. It is def one of the first Flat deck 308s built. Not to contradict anybody I'm just stating what Ive heard. Anyway its been a while since Ive been on. Hope all you guys are doing well. You all taught me sooooo much here. It was greatly appreciated. Crappy Spring. Just got in the water a few weeks ago. This is actually the boat that pushed me to start my build when I did. Its Beautiful.