| |
Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
====
| | | Forums66 Topics128,009 Posts1,055,293 Members48,419 | | 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 2010 Posts: 74 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 74 | Hello folks, well im sorry to post this as see now often its comes up, but cant get to the bottom of it?
ive picked up a bit of a strange engine today?
Numbers;-
Head – 3835913 is it a 235?
Block 3837012 is it a 261?
Serial number by distributor F311k or maybe F3IIK…is it a 1957 engine built in flint? 3rd November? And a 34-35-3700? What ever that is!?
No history on engine at all? But hoping it’s a 261..it has the 261 captains bars on both sides and thinking it may have had a 235 head fitted?
im trying to work out what it is and what year it is to help rebuild, it also has no oil filter just pipework coming out the side? would a standard bypass oil filter from a 235 fit it?
1953..panel truck.I love my truck!...
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Daniel-Rose, I don't see a question here, other than in your header??? | | | | | Joined: Mar 2010 Posts: 74 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 74 | thanks 3b!!
Hello, well ive picked up a bit of a strange engine today?
Numbers;-
Head – 3835913 is it a 235?
Block 3837012 is it a 261?
Serial number by distributor F311k or maybe F IIK…is it a 1957 engine built in flint?
And a 34-35-3700? What ever that is!?
Im thinking it could be built on November 3rd?
No history on engine at all? But hoping it’s a 261..it has the 261 captains bars on both sides and thinking it may have had a 235 head fitted?
Im looking for details so I can order parts, there is no oil filter? Would a standard 235 bi pass filter fit?
1953..panel truck.I love my truck!...
| | | | | Joined: Oct 2004 Posts: 1,780 Master Gabster | | Master Gabster Joined: Oct 2004 Posts: 1,780 | Hello folks, well im sorry to post this as see now often its comes up, but cant get to the bottom of it?
ive picked up a bit of a strange engine today?
Numbers;-
Head – 3835913 is it a 235?
Block 3837012 is it a 261?
Serial number by distributor F311k or maybe F3IIK…is it a 1957 engine built in flint? 3rd November? And a 34-35-3700? What ever that is!?
No history on engine at all? But hoping it’s a 261..it has the 261 captains bars on both sides and thinking it may have had a 235 head fitted?
im trying to work out what it is and what year it is to help rebuild, it also has no oil filter just pipework coming out the side? would a standard bypass oil filter from a 235 fit it? | | | | | Joined: Oct 2004 Posts: 1,780 Master Gabster | | Master Gabster Joined: Oct 2004 Posts: 1,780 | Looks like you have a 1954/55 head and a 1955/1957 261. The head should have had some additional coolant holes drilled into them so that the head would be compatible with the 261. The proper head would be 3836848 also referred to as the "848" high compression head used until the end of the 235/261 engine. Here's a good resource for finding out what your casting number means | | | | | Joined: Mar 2010 Posts: 74 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 74 | thankyou GMONIZ, and also for making my post readable!
1953..panel truck.I love my truck!...
| | |
|
|
| |
