Here is my new Ram 2500. I ordered the Equalizer 2 1/2" 12"/6" Drop. This is part number 90-02-4900. The ball is just slightly higher than the top of the tongue with the trailer level.
2-1/2 shank. 12 long x 6 max drop or 10 max rise. : Equal-i-zer Hitch Store
I have a heavier hitch weight than your 23fb so I have 5 washers to angle the head. 1000 lb bars which are set parallel to the trailer frame.
The distance from the ground to the bottom of the receiver opening is about 23". My truck has the 20" tires but I measured the distance on a Tradesman with 18" rims and it was the same.
My trailer has 15" tires while I think yours might have 14" rims. Maybe your trailer sits a bit lower than my 25fb.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
2010 Tundra 5.7L, Double Cab, 2wd, White