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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!
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| | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | They will indeed run off the engine vacuum by hooking the line straight to the intake manifold.
My 58 Chevy is this way. Only time it gets to be a problem is if you pull a steep hill.
Course with the 261 it has to be quite a hill before they slow very much. | | |
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