I was just looking again at your new/old engine. Is the exhaust manifold the stock unit? I thought they were all a single collector, but you have a dual?
I get your thinking that nobody is paying attention, but we are.
The 261 has what I'm assuming is an OTC manifold. It came on a 235 I bought which was taken out of a 56 Chevy in 1977. The dual exhaust manifold is from a 55 Corvette. There were only something like 300 of them so I doubt it's a factory installed one, but who knows...
