We always had 1/8 MPT tapped drain holes on each side of our all our blocks.
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 Bob C.
Quickest, Fastest, Best selling Pontiac Aftermarket Block IA II and Tiger Heads
Boss Bird Funny Car
Best pass to date 08/06/2016 6.027@231.64
Allpontiac Big Chief Aluminum Engine Block
http://www.AllPontiac.com
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