Edelbrock RPM Air Gap?
Well I have a Dartsport but I am sure the spacing would be comprable to a duster. I have an Airgap intake with 1" spacer with 2 3/16 gaskest and I have the mopar Air cleaner but I have to run a special K&N filter that in't as tall to get it all to clear! If you want I can get you the part number of the K&N filter I use.