What does your race cover run for everything I’d need. How much will it quiet it down?There is a noise attenuating cover ( borgs johhn deere race cover)
you could need to change out your piping or weld a flage on the compressor boot slip cover. It is the cover from 17288 turbo. I have several.
An extra strip of weatherstripping on the hood/ fire wall will dampen some of the sound as well. It is only a modest improvement.