I installed Koni's on the front this past spring replacing the factory installed Blistein's. The rear has year old Blistein's. 2006 18K (15K rolling weight) F53 chassis. There was some difference in performance on minor bumps but a hard jolt is about the same. I do notice a bit less dish rattle when the coach front axle hits something as compared to when the rear axle hits the same.
Has anyone ever determined what the front and rear ride height should be for a F53? The Ford specs are for a stripped chassis but what is it once they build a house on it? Wonder how much I might be bottoming out causing the harsh ride.