I was wondering if the brake booster on my 68 144 is working. The brake pedal feels about the same with the engine off as it is while running. I disconnected the line to the booster and plugged it. I drove the car and the brake pedal feels about the same. It doesn't take a lot of effort to brake while driving. Just not sure. The owners manual talks about servicing some filter in the booster. The Haynes manual I have doesn't cover that very well. I looked at the elbow on the booster where the line attaches. I think that is some type of check valve but it doesn't want to come off very easy so I left it be. I replaced all the rubber hose over to the intake. I don't sense a vac leak. No change in idle when you press the brakes.

Craig