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Click on image for the lowdown. 
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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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| | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | bigmacdaddy,
I have read that you can expect between 17 and 20 inches of vacuum with a engine that is properly tuned, equipped with a stock cam and in good mechanical condition. It sounds like your rig fits the bill.
Stuart | | |
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