Lee, here is the spacer in place. It's in between the manifold and head. If you look closely you may be able to see from the left side if there is a spacer or restrictor plate in place.Here is a pic of the spacer plates in place.
Only 05's had them with the "E" carb.This hasn't seen day light for a while, let's see what I can learn! Are the restrictor plates still in use today? And do you suppose they'd be in my 07 K9 from the factory?