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Click on image for the lowdown. 
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| | | Forums66 Topics128,012 Posts1,055,312 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#77172 05/07/2007 12:11 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I have no clue what it is, but I can tell you it isn't for a filter. The filter would get its supply from a T fitting from the oil pressure port, and return in a hole further up on the block.
Bill Burmeister
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