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Click on image for the lowdown. 
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| | | Forums66 Topics128,064 Posts1,055,859 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!
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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: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | You'll need to find the date code to determine the year and the casting number to determine if it's a 230 or 235. I know the 235 and 230 are physically different, LOL (poor choice of words by me). I should have said the only way to date an "A" suffix 6-cylinder engine built between 1957 and 1964 is by looking at the cast date code. Mike B 
Last edited by Mike B; 11/29/2018 3:32 AM. Reason: spelling
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