I'm sure this topic has been brought up frequently. My booster isn't working as good as it should. It works but I can't lock up the brakes. Used to be able to. Back in the late 80's I did the disk brake swap from a '72 Newport to my 66 New Yorker. It worked well for many years until the master cylinder puked into the booster. So I tossed the booster back around 2004 and went with this: All ma mopar stuff so it bolts right up. It is an 8" booster but I don't remember where I got it from anymore. After years of working on the car with extended periods of it sitting that info is lost. I have an electric vacuum pump that creates 22" of vacuum, that is sufficient. I did the classic booster check: step on the brakes and wait until the vacuum comes up. Pedal drops about 1" or so. The vacuum pump also shuts off for long periods when it reaches max vacuum, no vacuum leaks. So the booster is good. Just not enough surface area to apply sufficient force to the master cylinder push rod. My guess is I need a booster from a '72 but they are not available from any parts stores. I did check with napa and they don't have one but they do have a photo. It looks like it will fit, the pedal rod length is right and the bolt pattern looks right. Anyone have any ideas on this? It's one of the last items I need to deal with so I can go on a road trip and take her to the local car shows.