I dug through the 60-68 MPC and that doesn't help. I referenced 68 -- it should have been 67.
Since these things are not part numbered I'd be curious to see the three styles referenced.
Bill, the "Moulding - Luggage Compartment Front Access Door Trim" is part numbered as 45770. The 67 one year only and 60-68 both list the same part number; C7ZZ-6345770-A. The part appears to have been omitted from the 65-72 MPC.
However, the 67 does not list any retainer, but 68 does, as C7ZZ-6542527-A. That is the only difference that I see.
Does the inclusion of the retainer in the October 1967 MPC mean that the trim piece did not have holes at this time? Does a quantity of 9 retainers make sense?
I'm really surprised that design change was allowed to move forward without a part number revision.