My 2 cents: when you lift it, do it right. Get all good parts, don't go cheap. A BII isn't the most stable vehicle to begin with, lifting it 4 inches isn't going to help.
I put a 4' lift on a mid 80's ranger back in the day and getting a quality kit is key to getting the steering geometry correct, having good spring rates and matching shocks, etc...
For general stability be sure all the parts are good, tie rods, drag link, steering box, bushings, etc... before you do a lift. Adding a lift to worn out parts just makes it worse.
Pushing the tires out wider will give some stability.