Ok- I recently picked up a 72 Z and at some point the carb was changed to a Holley 600 and the car now has a cheapo repro chrome open element air cleaner without the pipe on the bottom that goes to the valve cover. I'd considered buying a correct air cleaner for the '72 (dual snorkel), but I'm wondering if there might be a fitment issue with the 600 Holley- which might be why it now has the repro open element air cleaner. Now I'm thinking I should just find a correct open element air cleaner BASE only. But will that one fit? I ordered some parts from Classic Industries and they would allow me to return a wrong air cleaner if I paid return shipping- which seems fair. Can you guys give me a bit of direction?