1972 dodge dart brake master cylinder

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Pumping the peddle once or twice before actual braking seems to help but the whoo peddle still requires quite aa leg to haul it down.any ideas? Great site by the way.

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I want to isolate the problem to the master or the distibution block or maybe it is a combination of both issues? I did lengthen the brake rod and have good peddle travel.

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I have left the stock six cylinder distrbution block in place but have installed the rear prop valve south of that. I also have installed two rubber brake hose lines just off the master cylinder much like what was done by the factory. I used a standard B body dual master cylinder with the offset fire wall plate to clear the hemi valve covers. What concerns me is the spongy brake peddle I have.

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I have a SSBC prop valve installed in the rear brake line. The rear brakes are 11x 2.5 B body stock units (I like my cars to go fast and STOP). I bought and installed a front disc brake kit for ECI. Just completed my hemi dart project and have some gremlins to work out.

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Have a technical question regarding brakes.

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