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Click on image for the lowdown. 
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| | | Forums66 Topics128,030 Posts1,055,430 Members48,422 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | If your vacuum is below around 15", you have gone down the wrong path. Also if you have more than 2" of free trave in your pedal then that's a sure sign of not enough vacuum. You also need to measure your brake pedal ratio. Check on how to do this on one of the quality brake companies websites.
Six volt guy living in a twelve volt world
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