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Click on image for the lowdown. 
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2 members (Samantha, klhansen),
308
guests, and
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robots. | | Key: Admin,
Global Mod,
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| | Forums66 Topics128,162 Posts1,057,042 Members48,460 | | 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: Aug 2011 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 45 | NGK 3332 works well in the GMC heads. Gapped at .045 with HEI.
The older I get, I only want to work on older rigs.
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