I wouldnt worry about it ! The T32 rear spring is the main issue for poor ride at the back , The spring is designed to carry a Ton and when you drive it around empty it will be bouncy .
I must actually put the springs in to our spring tester and get the facts of how much harder they are . Once the camper conversions are finished it will be better because you will add weight . The ride can be improved drastically with a set of Quality Shocks so if you only want to sort comfort change the shocks , If you want to lower it then with the correct spring it will lower the van and correct the Rake at the same time ( after the conversion ) . We would need measurements once the conversion is complete and we can spec a spring to sort it all out . . Results are brilliant !