Moroso 5" alternator pulley for street?

I'm not sure it will be a over all benefit ... you might not gain a whole lot ... although you will gain something. I saw a 5" alternator pulley for sale the other day on here and thought "WTF".... never saw that before.
Now to use a under drive crank pulley you will gain for sure. Got both my 408 stroker in my truck and the 360 in my cuda under drove using smaller crank pulley. :D

Sorry I can't answer your question. Curious myself.