Brake booster going out?

the peddle is firm, but nothing like with a broken booster. i'm not home but here's a pic from another thread i had. this was a 74' that had power brakes. just removed the booster and gently moved the MC into position. no need to open the lines up, just don't kink the lines
View attachment 1715562962
Thanks a ton. I'm going to grab a new Master just because mines so crusty. Might order the lines just in case cause theyre a bit rusty too.