Tom, glad to see you are going to use a divided runner intake on some of your dyno tests. Years back I had a '66 chevy truck with a 292 and 4 speed that I installed an Edelbrock SP2P intake manifold on. It was advertised as a fuel mileage manifold but the increase in low and low midrange torque was noticeable and the fuel mileage improved also. The engine was stock except for a split exhaust manifold and the Edelbrock manifold was set up to use the stock 1bbl carb. I'll be interested to see how the Brazilian manifold works with your port dividers.