Yes, I have the flip up seat back. In fact, it is already upholstered. All work on this car was stopped in 1992. That man had bought everything for this car. He then went to a "restorer" to get the work done. We all know how that goes. My friend traded a snowmobile for it and never touched it. I got it in 2006 and had to remove the body from the frame to sandblast and paint everything. Time marches on and I am finally going to get paint on it this spring. I have been driving it up and down the road sitting on a milk crate. So, while it is still cold, I have been wiring and looking at this package shelf. I am going to use hard wood 1/2-inch plywood and a 3/4-inch hardwood piece at the front. I have all the covering from the LeBaron Bonney kit that was purchased in 1991. It is a Super Deluxe so grey covering. I believe 1947 and 1948 were Deluxe, hence the brown covering.