i have 4" tg springs. lift was ~8" ,from 18" stock to 26". granted the stock springs were sagged badly (rears riding on the overloads fronts all but touching the bumstops). fits 34" swampers that just barely touch under full compression, in the front. rears all but touch.

It sounds like you want the look more than the ability. Not to say that your truck won't be capable, any Toyota with a mild lift and 33" tires will surprice you. If it were me and you like the way it rides and just need clearance for bigger tires, and you have a good rust free frame and body (body mounts), I would go with the 3" body lift if you want to keep the cost to a minimum. If cost isn't an issue then new front and rear 3"-4" springs of most any brand that mounts in the stock locations except Northwest Off Road(way too stiff). If you want the middle ground front springs with no more than 3" lift rear blocks. It will ride close to the same probably better and be less costly than all new springs. Don't forget shocks must be changed with a suspension lift but not with a body lift.