I've been reading a lot of posts on this site over the past couple years as I work on my 52 B3B. Did a lot of research before purchasing an interior kit and ended up going with QuietRide. They were super friendly, helpful and knowledgeable. I had them send me the back panel in a single piece and it looks great in my 5 window cab. With minimal trimming it was pretty easy to install and looks great. Just wanted to give them a shout out on this forum and if anyone is looking for an interior, I can't recommend them enough from my experience. All I have left is to install the two kick panels and create the cutout for the interior light.
Now off to cut a floormat...