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Click on image for the lowdown. 
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| | | Forums66 Topics128,064 Posts1,055,860 Members48,428 | | 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
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Nov 2002 Posts: 59 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Nov 2002 Posts: 59 | It is all in the bore size. A 261 shares a common crankshaft with 235 engines. And yes the 261 is a orginal motor size. | | |
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