Con'grats on your new toy....we just recently picked up a 28 ft Ambassador...a 78 model.
I've been busy upgrading many items...
Replaced Univolt converter with new 3-stage converter/45 amp charger.
replaced tail, stop and marker lights with LED units.
installed new AC unit, replacing original unit.
added a Winegard 'Trav'ler' sat stationary tracking Dish TV antenna for our 22 inch LCD HDTV.
removing all three original ceiling vents and replacing with new Fantastic Fan vent units from Vintage Trailer Supply...these special units have flat gray rooftop covers, and the inside trim panels have a curved lip for Airstreams....This upgrade is a real pain, as you have to drill out 48 rivets on the old vents, then trip the outer and inner skins to fit the new vents - the corners have to be 'square' instead of 'rounded'...the real pain is scraping off all the old sealant on the roof...there's usually several coatings up there on older trailers! I have to do ours during the heat of the day, when the goo is softer!
installing recessed LED lights in the ceiling...here's a pic...
I've already purchased a new variable speed water pump as an upgrade, but will hold off installation for now as it's a big job to cram it into our rear bath's compartment...the old pump is still 'churning' away, but it's getting tired after 30 years!
Our water heater, furnace and refer are still working, so we'll just keep on using them till they give out.
We intend on ripping out the carpet that's wall-to-wall in our AS and replacing it with some 'floating' style strip flooring. The old carpet tends to hold the 'smells' no matter how hard one works at cleaning it!
We also intend on getting rid of all the curtains that line the walls and replacing the roll down shades with those day/night type folding shades. I think the curtains also hold the old odors from inside the trailer, and those roll down shades are just plain OLD! This will have to be a winter project!
Oh yea, I forgot to mention that I'm also removing all the old red/blue stripping from the rear outsides...another real 'fun' job...using that stripping goo and then scraping off the old paint and taped stripes! I removed the cast 'Ambassador' plaques and stripped the old paint off and will repaint with some fresh boat type topsides poly paint. I'm going to put 1 inch red and blue stripes back on instead of the wider, original type - I think it will look better that way. The pic below is of the original striping, a week ago...it's all stripped off now, waiting for me to get up the energy to apply the new stuff.
As you can see, the list goes on and on with an older AS...but as they say...getting there is half the fun!