3rd Gen 4Runner Lift Information and FAQ's
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This is really helpful as far as Lift/armor/suspension etc. go.
You probably should have had the front end suspension figured out before you had the bumper installed due to the fact you have that extra weight now to deal with after. Also you didn't give specs of the bumper. Manufacturer is it Plated/tube/winch mount/no winch mount/combined weight with or without a winch. Give a little more info and you might get a few more bites.
Also post a pic and show it off! Cheers.