Hello, I am new to the forum but have a question. I recently removed a 200 six from a parts car. Upon removing the exhaust manifold found that the 3 & 4 exaust ports that are normally not divided were, this is not a port divider, but part of the casting. The casting shows it to be a 68 vintage head. It was a Fred Jones rebuild. Anybody seen one of these before, I have been working with these engines for over 20 years and have never seen this. Thanks for your input. Mark