Ok i am running a kinda of a wild port and polished head on a LS(B18B) and 3 angle valve job also with i/h/e right now and i was told it is in need of extra fuel cuz its sucking in too much air cuz of the p&p and thats the reason why it is sluggish. so my quetion is. is this true? and if it is can i just use a Adjustable Fuel Pressure Regulator? or do i need like a s-afc?