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Click on image for the lowdown. 
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| | | Forums66 Topics128,107 Posts1,056,221 Members48,436 | | 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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#57036 02/25/2006 1:37 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | I have seen water pumps w/both patterns-as well as fans & pulleys w/both patterns, I'm not sure when thewy changed, but I believe the later pattern is the larger of the 2. brian | | |
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