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Jul 21st, 2025 | | | | Joined: Apr 2005 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2005 Posts: 38 | I have an old engine block that came with a 1954 corvette I purchased that is taking up way too much space in the corner of my garage - (ha the engine block that is..). I would like to know what this is for so I can list it .
Here are the numbers:
date B 19 2
GM noted to the left of the dizzy
part number 3769716
stamp pad F0220BE
Does not include the flywheel, adapter plate or head. I assume this is a 235?
This will help me getting to the right folks on the board..
Thanks,
John | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | It is most likely a 1962 235 truck block.
Why might you think/ask about it being a GMC block?
| | | | | Joined: Apr 2006 Posts: 506 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 506 | Date B192
Feb 19, 1962
F-02-20-BE
Flint
Feb 20
BE - Model 1700/Impala, 235 w/ powerglide & power steering
-Tom
1950 Chevy 3100 w/ 1956 235
| | | | | Joined: Apr 2005 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2005 Posts: 38 | Thanks for the information on the engine block...I was baseing my assumption on what the previous owner thought he had in the car. He thought it was out of a GMC truck. How he determine that was - well maybe questionable - especially in light of some of Bubba's retrofit work that was done to get it into the frame.
Very helpful to know this block is from so I can get it to the right folks in case someone is looking for one as much as I want to have it hauled away!
Appreciate it,
John | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | '54 Corvette. Wow. Always wanted one of those. What is the number on the engine that is in the car now? Folks here could help you ID it.
I have heard the 261 (truck engine) is a good block to use in a 6 cylinder 'vette.
Does it still have the 3 carb setup?
Kurt | | | | | Joined: Apr 2005 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2005 Posts: 38 | Well the early Corvette 6's utilized the 911 truck block but a different head. I was able to find a nice truck block in Pa. Geez the Corvette heads are real pricy so using a standard 235 head. I do have the tri carb set up that came with the car. This is going to be a DRIVER not a trailer queen. Love the 6's and why I gravitate to the Stovebolt site. You folks are so helpful in fine tuning these old engines....get everything running right one can just throw any fiberglas boat hull on the frame and have a great time on the road!! Ha | | | | | Joined: Dec 2008 Posts: 1,915 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,915 | 216, 235, 261: 2 freeze plugs
GMC: 5 freeze plugs | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | You might try to pick up an "848" 235 head. This was listed as the replacement head for the Corvette six after production ended on the Corvette 6 engine. Fairly common and relatively high compression.
Kurt | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | From 1956 onwards, the 848 head was the replacement head for 235 Corvettes and all (18 bolt) 235s (good luck to 1953 235s). It was the head used on new 235s from 1956 onwards. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | GMC blocks have the displacement STAMPED on a machined pad on the starboard side of the block, just behind the distr., i. e. 228xxxx,248xxxx, 270xxxx,302xxxx. They are also about 3" longer than 235/261 engines.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Apr 2005 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2005 Posts: 38 | Some great information here...and glad I asked. Seems my block is not a GMC block as thought. Regarding the head I was fortunate enough to have a good 848 that came with the new block I found and during the coruse of the rebuilt there were no problems found.
You guys have been a great help!. | | | | | Joined: Apr 2006 Posts: 506 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 506 | The "oddball" 1953 block that the 848 head does not fit is 3701946. That block had a mechanical cam, in both cars & trucks, and both with head 3701887. They tried 3 differents crankshafts in that block until they came out with the later 53 blocks. I don't think trucks had a later 53 block, just cars.. From then on, all 235 & 261 blocks had the same crankshaft 3701488.
-Tom
1950 Chevy 3100 w/ 1956 235
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