Hey guys! I’m in need of some help again. I’ve searched all over Youtube and Google but I can’t find any guides to help me replace my brake booster (it’s an A1 Cardone). I tried to tackle it today but I really didn’t want to end up with brake fluid everywhere! 
Does anyone have a step-by-step reference guide or can help walk me through the process? Thanks!!
Tootles~
Krystal
Doing a booster is quite a bit of work. It’s not hard, it’s just not fun. First you need to remove the master cylinder from the booster from the engine compartment side. Then you need to remove the driver’s seat as you’ll be working under the dash. You need to un-attach the stop light swtich from the brake pedal shaft so it’s loose/free. Then you need to remove all #4 of the nuts off the studs of the booster up under the dash on the firewall. I don’t know about other years, but the '69 has a dash bracket over one of the booster studs–you need to remove that and then also the booster nut beneath (so 1 stud has 2 nuts). Lastly, IIRC, there is one nut holding the booster on the engine side…then it’s free. It’s not hard, but the nuts on the booster studs take forever to get off and it’s a tedious job. Depending upon your year car, Muscle Car Research sells correct foam gaskets that fit between the booster and the firewall on the engine side.
Sounds like a great time 
Thank you so much for your help!! It would’ve taken me forever to figure it out!
Since this is a lot of work, you might want to search threads about booster type and reliability (Midland and Bendix). The aftermarket rebuilds don’t seem to have good reliability experience. Booster Dewey in Portland Oregon has a good reputation. You can buy direct or WCCC sells his.
OMG… that was an adventure of epic proportions! I cannot believe how difficult it was to get those 4 nuts out! I am sooo happy that I have small hands which totally smell like brake fluid right now. Deadstang, I took your advice and took my driver’s side seat out. That was so helpful! I tested my brakes and they are definitely a LOT better than before but now there is a vacuum leak somewhere… not sure if it’s coming from the booster? I just looked online and found a gasket that goes between the firewall and the booster… 
. Anyhoo… I’m really glad that I was able to do it but if I ever have to do it again, I may just have to throw on a cute sundress and drive it over to the classic auto shop. Totally gonna pull a damsel in distress. 
Thank you so much for the help!
Welcome to the forum here. Tons of information and help here. Your adventures are only just beginning. Seems like they never end. Are you taking progress pictures? Do you have any pics of the car or work you have done?
Just try being my size and trying to fit under the dash (I’m usually in too much of a hurry to remove the seat, and that hurry usually gets me a trip to the chiropracter). Vacuum leak? Was it noticeable before the new booster? I would make sure the check valve is not partially out, and that your hose fis tightly. Brake or carb cleaner will help you find it in a hurry. Just start the car and spray it around fittings, intake, and carb, or any spot that you might think is suspect, one at a time. When the car acts like it’s gonna’ die, you’ve found the source of the vacuum leak. Just be sure to use brake cleaner around rubber lines, etc. as most carb cleaners will destroy rubber.
Oh yeah, and welcome to the forum.
This how to video will shed some light.
https://www.youtube.com/watch?v=H6959c6ayKI
Make sure the brake light switch gets installed correctly. See listing for diagram.