Here's what I did on my 77 Mustang. It wasn't too hard to make up. A stock air cleaner had a second snorkel added and the ducting to the grill were stock units (the factory V8 on the right and a factory V6 duct on the left). The hose was over the counter at a parts store.

For street driving in the rain a foward facing scoops or a set up that picks up air directly from the grill (my intakes are offset to the side of the grill opening) is not really the hot ticket. At a minimum water soaked air filters get old real quick or worse case you could hydraulic the engine.