Agree it's had to find floorplans for a 04 Dynasty. How many slides does your 40’ Dynasty have? If 3 it's probably a Baroness. 04’s have the same names/ floorplan as 40' 03s.
https://library.rvusa.com/brochure/03Dynasty.pdf
Below are the possibles for 04 40' Dynasty
Baroness SS 400hp
40' Motor Home (Class A) # of slides 3
Legacy 400hp
40' Motor Home (Class A) # of slides 2
Platinum 400hp
40' Motor Home (Class A) # of slides 4
Chancellor 400hp
40'6" Motor Home (Class A) # of slides 2
Regent 400hp
40'6" Motor Home (Class A) # of slides 2