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Click on image for the lowdown. 
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8 members (Wally / Montana, Otto Skorzeny, TUTS 59, Jon G, JW51, 3800GUY, cmayna, 52GMC35424JD),
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Mod | | | Forums66 Topics128,065 Posts1,055,865 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!
| | THANKS!
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 2007 Posts: 21 New Guy | | New Guy Joined: Jul 2007 Posts: 21 | Oh, yeah, on the spark plug side of the '848 head it says B58 848 850, I read some where that the B58 is some kind of date code, would that make this head date February of 1958? Does anyone know what the 848 and 850 mean? The head on my engine now says B18 66 570, but the casting puts it at a 45 or 55, does that ruin my date code theory?
Thanks agian
-Alan
Alan
Georgia Tech Research Faculty
1949 Chevy 3600, Fred
1955 1st series NAPCO 4x4, Budd
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