[Chulisohombre]

Bouncy truck has it right. You need at least 8-10 inch total Lift to get 40s under without Cutting. Or hitting the fenders With the tires Off Road. I don't really like body lifts Myself Because The added height over the frame that make it top heavy and put more force On the body off road. You already got The axles for the tires. Being on onetons it almost gives you a inch of lift over stock With the diameter of The axle tubes. A 6 inch with body lift like you have should be all you need to save the body and fit 40s for most situations. If you need a couple inches more go with 8 inch springs. Anything over 6 inch like you have now will probably need a custom driveshaft in the front and maybe rear. Also anything over 6 inch won't have much give in the springs unless you do a b52 kit up Front and move the shackle frame and Front spring mounts to get a Spring that flexes Better. The 40 inch stock spring Size already inhibits flex in the front already without arching it More for The lift You need. That or you can do a custom coil suspension if you have the time and money.