[2blu442]

There should be a vent that is a plastic piece with a chunk of foam or cotton like filter in it. It's maybe three inches long by one inch wide and half an inch thick. This is attached to the underside of the floorpan in the depression for the rear end on the passenger side. It would have two hoses running to it, one maybe 3/8" the other closer to 1/4". You should see a strap of metal much like the ones that hold the tail light wiring harness to the floorboard under the seats. This is folded over the "vent". If you have a Chassis Service Manual you might be able to find a photo or diagram, if not I can try to get some photos of it. I've found this setup on both 1969 and 1970 Cutlass/442's. John