After replacing the rag joint on my 67 SS, I went to take it for a test drive. Good news is that the steering is working fine. The bad news is that the brakes were barely holding with me literally standing on them at each stop sign. Needless to say, I ended the test drive early and have the car safely back in the garage. I have an SSBC electric vacuum pump kit installed (previous owner). I'm suspecting the vacuum switch, but is there a way I can verify that? I want to avoid ordering unnecessary parts if possible.
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