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Click on image for the lowdown. 
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| | | Forums66 Topics128,023 Posts1,055,367 Members48,420 | | 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: Mar 2007 Posts: 4,215 Moderator | | Moderator Joined: Mar 2007 Posts: 4,215 | My uncle worked at the McKinnon plant in St Catharines Ontario where the 261s were made. I've noticed that the Canadian blocks had a M with a square around it cast into it. I don't think they were made beyond 1962 either, but I'm no authority on the matter. | | |
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