The All Pro springs that Marlin used to sell were 220lb rate and about 240 or so in the back. With a leaf spring if you go softer you induce additional axle wrap and then you need a torque arm or axle wrap arm to control it. 220 on a leaf is soft but on a coil 220 (for a toyota mini and spring on the axle) is super stiff. Im at about 75lbs in the front of mine and about 80 in the rear.