If you own a Panelray heater, long tube type, from a 1950's Airstream, could you post a couple of pictures of the inside, with cover removed.
I am putting mine back together and it looks like it is missing a piece at the top.I am only guess I may be missing a piece based off the water rust line and two screw holes. But so far I found a lot of screw holes that went to nothing. As well I can't tell how many vents it had going thru the roof. I have one, but it's to small. I would think there would be two. One fitting around the small oval exhaust outlet, and then a larger one around that one that. See picture. This picture is looking from the top.