looking at buying a 97 ford expedition for my wife because she is pregnant with our third kid and need something bigger that can hold 3 car seats. the one im looking at does not have 3rd row seats. im been searching around and cannot find anything that says if you can get the third row seat and put it in ones not equipped with it from the factory. does anyone know if you can bolt in the 3rd row, or if you have to modify to get it to work or if it wont work at all?