the master cylinder are also known for having to be rebuilt. will the brakes pump up at all or is there nothing ever there? as for the bolts I just reloctite mine and have had no problems. the seals i would replace only if i find a nick,cuts or appear to have leaks. Also pack the front bearing hub with grease when you go back together. I know the bearing are sealed but the grease will keep water out of the hub area. that water sitting in there will just make the bearings go that much faster.