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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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#54801 01/14/2006 2:26 PM | Joined: Oct 2005 Posts: 43 'Bolter | | 'Bolter Joined: Oct 2005 Posts: 43 | The 848 head has the smallest cumbuston chamber and will raise the compression on the motor about .5:1. A '58 to '62 261 has a compression ratio of 8:1 by installing the 848 head you will achieve a ratio of approx. 8.5:1 (assuming the head has not been milled and stock pistons). | | |
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