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Click on image for the lowdown. 
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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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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Unburnt fuel in the exhaust system?
and
O2 getting into the exhaust system?
I had the problem when "backing off" on the accelerator (". . . burps out the tail pipe going down hill coasting.....some loud backfires . . ."). It was corrected after lowering the float level in the carburetor and changing the exhaust gasket.
I do not know which solved the problem.
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