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Click on image for the lowdown. 
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| | | Forums66 Topics128,109 Posts1,056,271 Members48,439 | | 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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#62122 06/24/2006 9:54 PM | Joined: Jul 2005 Posts: 71 Member | | Member Joined: Jul 2005 Posts: 71 | What is the principle behind setting ignition timing to the highest vacuum gauge reading (instead of timing light, pinging etc)? | | |
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