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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!
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#83946 10/11/2007 5:23 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | The jimmy has a better combustion chamber design, and the valves go straight up and down instead of being cocked like in the 235/261. The good thing about the 261 is that intakes are cheaper and the block is shorter.
If clearance isn't a problem, I would go for the GMC.
I'm replacing my 261 with a GMC but its a 302. There's no contest there. The GMC engines cost more to rebuild than the 261, at least in the US.
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