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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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| | | Forums66 Topics128,007 Posts1,055,279 Members48,418 | | 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!
| | THANKS!
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: Dec 2008 Posts: 898 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 898 | Below the throttle plate is full manifold vacuum. Above the throttle plate is ported vacuum, which increases as the throttle plate opens.
Brian
1955.2 3100 Truck
The older I get the more dangerous I am!!!!! | | |
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