I'm not an authority on this by any means, but I think you would need to have something more complex than just an intake pipe facing front. The bigger air intake would certainly reduce your manifold vacuum and therefore give you a little additional power, but the most would be about what you would get by taking the air cleaner out. Unfortunately, the carburetor needs to generate some vacuum to work, which means a constriction that you can't get rid of without dropping in a fuel-injected engine.
To get boost above atmospheric pressure, you would need some kind of diffuser, which causes the air to slow down from the car's airspeed (weird combination of words) to whatever speed it's going into the carb, converting the kinetic energy of the fast-moving airstream into the potential energy of pressure without losing it to turbulence and heat. (long breath) The problem is that, even if you had a perfectly efficient diffuser, you would have to be doing 480 mph to generate 5 psi of boost pressure. The idea's elegant, but it only works well if you're flying in a jet aircraft (this is how ramjet engines work.)
Carbureted engines are generally tricky to run above atmospheric pressure; for example, if the carb float is made of a few large cells instead of a solid block, you have to put the turbo after the carb to avoid crushing the float with the increased pressure.
An airflow meter, combined with sensors for air temp and barometric pressure, senses the amount of air going in, and controls the amount of fuel mixing with it. A boost controller, I think, is something like a waste gate, which would either dump compressed air from the system or route exhaust gas around a turbo to keep boost pressure from getting too high.
