i have no knowledge about the floorpans...
but i do have both a amd and goodmark 68-70 rear deck filler panels
and when you throw them down right next to each other
there are alot of differances for being the same part
i should take some pics
believe it or not
the good mark is alot closer looking to original
but the amd fits better to amd quarters...
pop your trunk and let me take a look and
i can pick out the amd stuff a mile away
imo
i don't drink the amd koolaide
if i was on a budget, i would seriously consider it.