Welcome to the FiberglassRV forum. I had to "Google" your trailer to see what it was.... sure nice looking when new or restored. I've come to know these types of trailers as "canned hams" as that is what they resemble when the can is turned on its' side. Some of the members of this "towable all molded fiberglass trailers" forum have some experience with this type of "sticky" or stick built trailer, and most things like furnace
, water heater, and refrigerators are common to both our worlds. I'm sure someone will be along soon to steer you in the right direction for answers to your questions.
Dave & Paula