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Click on image for the lowdown. 
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| | | Forums66 Topics128,057 Posts1,055,812 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!
| | 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: Feb 2000 Posts: 5,204 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,204 | The vacuum can not be higher then barometric pressure of that day. 18 - 20 for well tuned engine, 30 is a bad gauge.
Joe | | |
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