IF YOU ARE BAGGED ON BIG WHEELS READ THIS!!!!

I have a 2001 F-150 Super Crew bagged on 23s and the wheels were hitting the stock brake booster so it was replaced with a booster out of a Ford Ranger, which is leaking. WHAT DID YOU GUYS DO IF YOU HAD THIS PROBLEM? I have a vacuum leak because of this and my gas milesage is shitty, not to mention the sound is annoying as hell. Any tips would be GREATLY appreciated.