imho, generally, pick ups have stiff rides because they are designed to carry heavy loads. there is nothing much you can do about it because of the chassis design, but you can still improve the ride, imho, by replacing your springs and shocks.
mgbawas kaya ako ng leaf spring sir? d naman maapektohan ride height nun sa likod noh? sabi ng friend ko lalambot ride pero ung capacity daw ng load ng bed mababawasan.