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Re: Brake vacuum
For the record, my '77 C10 idles at 8inHg in drive, and has very acceptable brakes, such that I don't even think about them when driving it, and it's been my daily for the past nine years.
Having said that, 8inHg is LOW, but my brakes are still fine. I would keep the booster, and add a vacuum pump if you simply cannot get the brakes to work adequately.
My '61 has Hydroboost.
Questions, I guess - is the booster broken? Operational? is the one-way check valve working correctly? Are the brake shoes installed correctly (small shoe to the front)?
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