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Click on image for the lowdown. 
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| | | Forums66 Topics128,111 Posts1,056,258 Members48,437 | | 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: May 2005 Posts: 215 Shop Shark | | Shop Shark Joined: May 2005 Posts: 215 | Hello all Just got a 66’ truck and trying to figure out what engine and if it is the original. Block is casted with 3914678 It has a stamped serial 18Z131952 And looks hand stamped VOI31EC
So far I found its a 68’ engine, 350 or 327
Thanks for your help! | | | | | Joined: Apr 2010 Posts: 436 'Bolter | | 'Bolter Joined: Apr 2010 Posts: 436 | You can look up the suffix code ( that's the stamped code) at http://www.1968ss.com/sbcsuffix.aspThe part you are interested in is the EC There are 4 entries, 1 from 1957 (283 cid) and 3 from the 60's (65, 66, and 67) - all 3 are 327 cid. | | |
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