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.

Gordy