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Click on image for the lowdown. 
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| | | Forums66 Topics128,075 Posts1,055,916 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: Aug 2018 Posts: 1,004 'Bolter | | 'Bolter Joined: Aug 2018 Posts: 1,004 | Can confirm
The default 53 Canadian 235 engines
block: 5843350 head: 3701887
All have that big plug you show
I have never removed one but I’m 99% sure it’s the water jacket because I had one with a hairline crack below that plug and coolant was seeping out the block in that location.
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