[MrMikey83]

Most Resin cast bodies are cast with a 'webing' of thin material in all the windows. It helps flow the resin through the mold as well as braces the roof better durring shipping.
They come with interiors, seats, dash's etc. You just have to cut the windows open when you get the kit.

The interior tubs on both look rather poor but that could just be the picture.
Nothing an exacto blade and a little putty can't fix though.
~Mike