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Mod | | | Forums66 Topics128,074 Posts1,055,913 Members48,429 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jul 2014 Posts: 892 'Bolter | | 'Bolter Joined: Jul 2014 Posts: 892 | I added an 848 head in place of the 55.2 head (don't know the casting #). I noticed two things: better fuel economy, more torque. It was noticeable on the road. I will admit that the intake valves on the original head had recessed into their seats to the point where I'd run out of adjustment on the rockers. Hence the change of heads. I'd calculated the CR to be about 6.8:1. So bumping to 8 was a significant upgrade.
1951 3800 1-ton"Earning its keep from the get-go"In the DITY Gallery1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971. | | |
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