Im looking for the best,most effective way of replacing the booster on my wagon. Is there a way of doing it without removing the Master from the lines?Any suggestions?

If the lines are in good shape it can be done. Just gently bend the lines as you move the master into a position that it will clear. If your not carefull you can kink the lines. I wouldn't try it if your lines are rusted over though. Then you are asking for a leak,