I'm doing the same thingon my 87 runner, I dont have all my parts to rebuild my solid front axle so im using the v6 brake booster. and I have the stock ifs width axle in back. the brakes feel pretty good to me? I'm going to upgrade to fj rotors and ifs calipers soon as i get money to rebuild the whole axle. if you ask me you can drive it around for a while till some more cash comes your way!