I am looking at upgrading my Bravada and I have the AWFUL computer controlled unit for AC and whatnot. I have a 98 Frontier I just love and it has manual levers and buttons for all of its functions. i would love to rip out a simpler climate unit from a regular blazer and swap it in, but I am wondering how much extra work would go into it. I know that the blend gate actuator is different, but how much of the rest is different?