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Re: Inline Proportion Valve has flare port in place of bleeder.
Correct 6 holes. 2 MC, 2 for F & R Brake Circuit, 1 for sensor, 1 for bleeder. Original to the 72 GMC C20 the valve block on left. Front port just above the reset button is machined for a bleeder on the original part. The same port on the new block is a inverted flare port. Fine if you need for a remote bleeder but getting an adapter for this port for a normal bleeder has been a challenge.
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