I added Eddy performer heads and a CH4B and now have a slight hood clearance issue, which was expected. I have read threads about using either a Ford Motorsports drop base and a shorter filter or a 69 unsilenced base, and I emailed Nick's garage as well, but wanted real world experience from someone with a 67 Coronet RT or GTX on how to keep the dual snorkel lid and get enough distance between airhorn and top of lid to keep some flow. Basically sandwich the odd base and filter to my stock lid... A part # would be great!