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Re: Vacuum boost brake conversion
11" will work with an SBC but with some headers some go with 9" for better clearance. If you have a camed motor that makes low vacuum go with 11" or a dual chamber 9"
With that said I have a single 9" on my 67 SBC Camaro running a camed motor making 12" of vac, no problem
I have a Right Stuff conversion
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