Well the Ford one has two holes one that is placed before the throttle blade and one after it. In this picture it has there relocation adaptor, so you can mount the AIC away from the front of the car using two hoses.
This picture is hard to see but the AIC mounts on the side so no hoses are required.
If the GM unit only has one line then where does it get its air from? If it just gets it from the air around it then does that not matter that the air is not filtered?