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Mod | | | Forums66 Topics128,055 Posts1,055,782 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
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2002 Posts: 127 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2002 Posts: 127 | How can I tell if my vacuum advance is bad without a vacuum pump. It moves maybe 1/16 - 1/4 inch when throttle is hit. How far is it supposed to advance? Maybe mine is bad? Thanks! | | |
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