Carpet for a 65 Valiant

OK, so I have decided to get the 65 Valiant 273, 4 door 4 speed running and driving. I need new carpet. Now, I can find a 2 door 4 speed carpet and a 4 door auto carpet, but not a 4 door 4 speed carpet. Are they really that different? I thought the floorpans were the same, therefore a 2 door carpet would fit a 4 door. Am I wrong or will I have to order a 2door 4 speed and use the front and a 4 door auto and use the rear carpet. Help