The Sun Valley should have two beds that are the same size on both the front and rear.
If you want to call them a King you are welcome to. Or you could go with the Queen. Either way the beds do not measure out to a king or a queen. I use a King sheet and heated matress pad for the king/queen bed of my 2000 Coleman.
If you look at the Owners Manual section of the protal you can get the sales brochure for the 2000 model year and it will have the bed sizes listed.