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Click on image for the lowdown. 
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| | | Forums66 Topics128,118 Posts1,056,305 Members48,439 | | 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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| | | | Joined: Apr 2020 Posts: 102 'Bolter | | 'Bolter Joined: Apr 2020 Posts: 102 | Trying to clear up some questions on what seals were used for these heads.
I read that the Positive Intake seal is not used prior to 1981. Just looking for confirmation.
1963 C20, 292 (4.8L). 4-speed.
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