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2.6L 5 speed '94 amigo

The main motor mod i've done is a Delta 270 cam. Since then, the intake is noisy at certain rpms and throttle position. It is around 2-3000rpms when i lay into the throttle about 3/4 open. then it goes away a bit higher in the rpms. It is sort of a sucking noise you might hear on a tuned honda.

Also, the power drops off at full throttle between 2k and 4k rpms and the intake noise gets louder accompanied by a gentle vibration. But full throttle above 4k it hauls ***. Is this all normal?

I feel like the noise is the motor asking for something. IE more air, more fuel, less back pressure...
 
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