Now that you mention it, the pictures are probably confusing. The body is standing on its firewall, and yes, that rear part up in the air will settle around the kickup of the frame. You only see a very small portion of it when installed, because the fuel pump and battery hide most of it. We were thinking about bending up a piece of 18 gauge steel and sending it off for louvers, and putting it inside that pocket. But after I realized how little you see of it, I decided to not go to that trouble. Plus, louvers would be hard to keep clean back in there.
Don