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Mod | | | Forums66 Topics128,094 Posts1,056,060 Members48,433 | | 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: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | If your talking about the two groves about 1.5" below the un-machined portion of the housing, no! The bottom one is obviously for a little oil to get to the shaft and I always thought that the next one up acted like a break or kind of like a trap so oil wouldn't wick up through the boss in the block by capillary action.
Denny Graham
Sandwich, IL
Denny G
Sandwich, IL
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