quick way to help sagging leaf springs on b body

Anyone know of a way I can take some of the sag out of my stock springs.I am eventually gonna buy new ones but dont have the cash so i was looking for a cheap alternative for the time being.I need to raise the rear about 2 in i am running a 235/75/15 and they rub the wheel well so i need to lift the car up a bit so they dont rub.i have already put lift shackles on the car.It helped a little but not much.
Author: jims72