Thread: 1966 GMC 305 V6 Service
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Old 04-19-2013, 11:06 AM   #43
Rufton
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Join Date: Apr 2013
Location: Knoxville TN
Posts: 1,170
Re: 1966 GMC 305 V6 Service
Oil filter housing mystery.
By-pass valve can't open if filter gets clogged.
Pretty sure it was that way in 72 when truck purchased.
Musicman70's by-pass is installed other way.
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