Air Cleaner base for a 163 Manifold question

[jasonL78]

A couple of questions is that a double pumper 750 or vacuum? The black to the left of the carb intake looks like a diaphragm? If running a 750 double pumper mechanical secondaries the tube on the bottom of that black base is going to hit your accelerator pump. I had to heat mine up and concave it to clear the secondary mechanicals. I never had any of my chokes hooked up and they were all manual choke carbs.