First, congratulations on scoring a really nice trailer.
Unless you have a lot of experience refurbishing one of these older molded FG trailers, I would spend some time thinking and learning first. I would not remove anything, as those are permanent steps.
If you have a lot of experience refurbishing a trailer, then IGNORE the rest of my comments!!
I am not a fan of carpeted walls either. They are common in the FG market, as they do serve an important purpose of insulating the walls, some sound deadening, and blocking
light too. Removing it means replacing it with something else to serve the same purpose = a lot of work.
I would not remove any appliances either. Even something as seemingly useless as an icebox does have some value. First, it can be used as an ice box. Me, I'd use it as a secure food storage area and keep a truck style compressor
refrigerator in my tow vehicle. Secondly, it fits a spot in the cabinetry. Take it out, and you have to fill that spot back in. Putting a
refrigerator in its spot can be a lot of work as there is no exterior venting for ice boxes, and no utilities ran to it. And depending on its size, you may not be able to find a
refrigerator that fits.
Instead, I would focus on what I call "delayed maintenance". First up is resealing the
windows. If they are like my
Trillium, the
windows are attached to pieces of wood on the inside of the trailer. Over 40+ years,
windows leak and this wood rots out. Secondly are however the body of the trailer is attached to the frame. Those bolts break and rot out. Third up is the frame itself. These frames tended to be under-built, and need a close look. Fourth is the
axle. Standard torsion axles have a stated life of 15 years. Then wheel bearings. Then the joint between the top and bottom of the body. Then the
electrical inside the trailer. If you keep the original
axle, wheel bearings. And so it goes....