I did not measure it but it looks like and easy 1 1/4" to 1 1/2". I would say my truck sits level when I place the rv to it. I just disconnected it and the rear raises 2"s with no load.
Pulled my Day Dreamer to Charlotte and back today for the first time since dealer installed my 988-AAs (snow plow front springs). Believe it or not I can tell a large difference in the ride and handling with these heavier springs. :-laf