Cubey, nice Shasta. My neighbors have one like yours. I think it's the same size and close to the same year. I did post a picture of it in another forum.
To put a tape measure to our TT the "box" is 8' wide and 16' long. The hitch is less than 2 1/2', so from bumper to hitch the entire length is closer to 18 1/2' than 19'. Title says 19'.
I like your propane lamp, I have a Solite gas lamp I am going to install in ours this summer and I am looking for another one to put in the bathroom. The one in the bathroom will be more for heat than a light when we are camping when it's cold.