Ron the "Standard" and "Deluxe" designations on the seat belt page are for the belts themselves, not the interior. "Standard" would indicate the base unit's plastic housing and "Deluxe" being the optional A39 (metal housing) belts.
So if you have a standard interior with the optional A39 deluxe belts, you would have 2 in the front and 2 in the rear UNLESS you also had A68 (Rear Seat Center Belt) or A68 and AS1 (Rear Seat Center Belt and Shoulder Belts).
As the page says, there were 24 different belt combinations for 67, NOT including colors, so it can get a bit confusing.
Ed