Yes, it is the most current generation of the Ford F53.
Start by weighing the axles or better, the individual wheel positions. Let us know what your axle weights are and also your GAWR (Gross Axle Weight Ratings) from the sticker that is usually near the driver's area.
Then go to your tire manufacturer's website and look up the PSI for your actual axle weights. All tires on an axle to have the same PSI based on the heavier side. Most of us add 5 PSI to what the chart says (it gives the MINIMUM PSI for a given weight). I mention this first, as you could spend a fortune trying to improve ride, and if your tires are 25 PSI overinflated for your actual load, you are wasting your $$. Start with the basics.
Please be more specific about what you want to change/improve-- as there ARE some excellent suspension upgrades, but there is NO silver bullet that cures everything.
If you will be at the FMCA Convention next week in Redmond, OR, come to my Suspension-- Coach Ride & Handling Seminar:
Suspension Seminar Thursday, 9:45 am in Seminar 4 This seminar will be webcast on FMCA's website.