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Old 11-27-2021, 06:10 PM   #4
Stiggy Pop
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Join Date: Feb 2011
Location: Granville, MA

yeah that's the block drain. Sometimes they don't do anything when you break them free until you poke out the 200k miles worth of crud build up. Can also be a good spot for water cooled turbo plumbing.
'79 242
943 pickup
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