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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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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Jun 2011 Posts: 39 New Guy | | New Guy Joined: Jun 2011 Posts: 39 | My 1958 Chevy pickup's 235 just got tired and I am having it rebuilt. In order to not be rushed on the rebuild I purchased what I thought was a used replacement 235 to put in temporarily while I wait patiently on my original 235 to be rebuilt.
However when I ran the engine block casting numbers I discovered I actually had bought a 261. The block casting number is 3769925.
My question though is with the head casting number. It is 3835913. When I tried to research it I came up with a number that was for a 54-55 235 engine. Did they use the same head for the 1959 261 engine?
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