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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,193 Posts1,057,260 Members48,466 | | 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: Jun 2010 Posts: 188 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 188 | Stock is generally 4-6 degrees. I see you're swapping in an HEI.
Bump your timing up to 12 degrees. | | |
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