I have finally gotten mobile enuff to start troubling shooting my PB problem on my '55. First some history - - - I had my power front disc brakes installed back in 2005 and after about 2 weeks the pedal got real hard and I took it back to my buddy who had installed it and he put a new booster on and the problem was solved - - - at least for 5 years hahahaha

I checked the vacum on both side of the check valve at the booster and it was good and strong but when I step on the "hard" brake pedal it seems to change the idle on the engine.

I know that I am being very wordy but I've never done anything like this and I'm working with a bad back, hip and leg trying to get ready to go to Lucky's Chicken Oil Cruise in Bryan on the 9th so bear with me.

I guess my MAIN QUESTION is this:
Can I replace the booster from the top side and not have to bleed the brakes afterwards? Unfortunately it's only me so I have to think this out before I open up a can of worms and I am not able to get under the car at the moment.

Thanks for any and all help and advise and Happy New Year!