I recently picked up a parcel tray cover that looks just like the '74. The seller says it fits the '72-3 as well. My '71 has a separate lip piece that screws on from the rear window side and fits on brackets that extend thru the tray piece. The one I bought has an intregal lip (all one piece). Is this the same as '72? In any case, it won't work in my '71.

So, is the '72 and later a one piece deal?