[Keith 944]

OK here’s a scenario if you had the hood open and had an air cleaner on it say a low profile air cleaner, how much room would you have between the vents and the top of the air cleaner? probably not much. So it’s probably around the same as the hood to vent clearance now.
I would suggest making a pass as close as it is and then taking that spacer off and making another pass see if there’s any difference.
go back with which one you prefer. Forget about adjusting the hood and making that look all stupid!