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I built the box myself, there are a few pictures of it in my gallery. There are a few different seats that come in the rear of those trucks and it makes all the difference in the world. I would do a few things different if I had it to do over again, such as i would build 2 boxes instead of one, just makes for easier handeling. But to awnser your question, I built the box and I did not have to move the seat at all. I did have to take the seat out to install the box, Not an easy task with the seat that I have. Its the seat that is 60/40 and has the steel fold flat floor underneath. I removed the steel foldout floor so that I could install my amplifiers.