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Click on image for the lowdown. 
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| | | Forums66 Topics128,154 Posts1,056,838 Members48,456 | | 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!
| | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The external line was added most likely because the passage in the block/head that would normally send oil to the rockers is plugged. Rather than fix it correctly, it was simply bypassed.
Bill Burmeister
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