What is the correct placement for the PCV hose for a 68 SB with A.I.R? Does the Passenger's side PCV hose fit to the side of the Air Cleaner or does it go underneath? My current air cleaner is a 15 inch with a driver's side snorkel but it has no PCV hose fittings and no riser - so I'm thinking it's a 67 manual and wrong for the car? Was the air cleaner base the same with the hole drilled for the PCV hose hookup?