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Mod | | | Forums66 Topics128,075 Posts1,055,919 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: Feb 2000 Posts: 987 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 987 | Milhouse I too have a 3837004 block and mine is a 235. Captian bars would be on both sides of the block if you had a 261. One of the easier ways to tell a 261 from a 235 is the size of the hole for the oil lines to the filter and sending unit on the drivers side rear of the block. The 261 has 3/4" pipe fittings (very large). Otherwise for the 235 it will be 1/4" or 3/8" pipe threads
Brian Moore
1949 3100 5 window Deluxe
"Today is better than yesterday, but not as good as tomorrow"
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