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Click on image for the lowdown. 
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| | | Forums66 Topics128,057 Posts1,055,816 Members48,426 | | 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: Aug 2008 Posts: 230 Shop Shark | | Shop Shark Joined: Aug 2008 Posts: 230 | yeah that's right i checked with the manual (the ole man )they are ported vacuum .you have to open the throttle to break the throttle plate's open to get vacuum to the advance . | | |
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