The car has an aftermarket system it has an Elko EP175 converter
I use to work for Ford and EA-EL's coming in all the time with aftermarket gas systems and none of them had the cold air intake blocked. What there done is put a metal plate in fornt of the cold air intake tube and drilled 3 11/2 - 2 inch holes on the under side of it. No one at Ford could tell me why they did this.
One gas place told me it was to do with Barometric Air Pressure and another told me it was to stop the effects of Ram Air. I live in North Qld so there aren't many places that do LPG conversions.