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Does anybody know what the hole in block behind the distributor is for on a 327 chevy engine?

Nov 26, 2006 by Brian R | Posted in Maintenance & Repairs

1960's 327 chevy small block engine. Hole on top of block behing the distributor. Not part of the intake manifold.

its an old 327 and its called a road breather aka early engine vent which was made into a PCV valve. you can block it off with a freeze plug but make sure you install a pcv valve or you will blow gaskets out. this is of course if its on the passenger

Christian | Nov 26, 2006

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