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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | 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!
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| | | | Joined: Oct 2014 Posts: 140 'Bolter | | 'Bolter Joined: Oct 2014 Posts: 140 | Will 235 and 261 heads interchange with one another? | | | | | Joined: Sep 2006 Posts: 2,393 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 2,393 | Later 235 and 261, yes. But, which way are you going?
Drew
| | | | | Joined: Apr 2014 Posts: 924 Shop Shark | | Shop Shark Joined: Apr 2014 Posts: 924 | A lot more details such as year & casting numbers are needed for anyone to answer.
Brad
Wrench Fetcher, PhD | | | | | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | Using a casting number 848 head on a 261 will result in somewhat higher compression, but some extra coolant passages need to be drilled in the head to match holes in the 261 block. A 261 head would be a drop-on fit on a 235, but the compression would be lower than with a stock head.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Oct 2014 Posts: 140 'Bolter | | 'Bolter Joined: Oct 2014 Posts: 140 | That helps a lot. I asked the question for a friend of mine and I'm not sure what year engine he has. | | |
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