Does anyone know for certain the difference between the mustang floor versus a cougar? Dynacorn makes a 1 piece that they say mustang or cougar. I know there is a difference in wheelbase, so I imagine there is a difference. I'm not looking for speculation, I want to hear from someone who knows for certain. I would rather do a one piece than the 2 long sides. If it will fit, ill use the 1 piece, because its easier. I don't care about tiny differences, I just want to do a nice neat job in the shortest amount of time. Thanks in advance for any input......Mike.