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Click on image for the lowdown. 
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| | | Forums66 Topics128,163 Posts1,057,044 Members48,463 | | 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: Aug 2004 Posts: 1,067 Shop Shark | | Shop Shark Joined: Aug 2004 Posts: 1,067 | You are running too rich.
Lean out your jets until your spark plugs appear powdery brown or tan, and you can then adjust your fuel mixture screws. But first your jets have to be right.
52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird
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