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Dr. Hamman
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I have a Chevy Block Cast # 3932388 Crank # 8932442 & Heads

Customer Question

I have a Chevy Block Cast #(NNN) NNN-NNNNCrank #(NNN) NNN-NNNN& Heads #(NNN) NNN-NNNNcan you tell me what the Cu in is and anything else.
Submitted: 4 years ago.
Category: Classic Car
Expert:  Bluewolf6 replied 4 years ago.

Hello, My name is Mike.

I could tell you more if you will give me the stamped engine ID numbers. These numbers are located on the passenger side of the block, just in front of the right cylinder head. Here is an example T0119HC may also have a partial VIN like 12C123456.

Please let me know if the numbers are still on the block.

Thanks, Mike

Customer: replied 4 years ago.
T0111HB & 19Z327851
Expert:  Dr. Hamman replied 4 years ago.

Hi, I will do my best to assist you. When you are finished please click on accept. I don't get paid unless you do. I don't know if you are a pro or a novice so we may have to fine tune the answer. I only know as much about your problem as you have told me in your post, so my answer will be based on what you have posted. Feel free to add any additional info you feel is needed.

Information on these engines can come from various sources. I have found lots of errors in some info from many internet sources. This info is directly from GM archives.


The block Cast #(NNN) NNN-NNNNis a 1969 290 HP 4 bolt main Z28 block. That is quite a rare valuable piece.

The Head #(NNN) NNN-NNNNwas used in 1968 through 1972, and were machined with different valve sizes for different applications. The valve sizes were from 1.94/1.50 to 2.02/1.6, they all had 64cc chambers and were used on engines from 290 to 370 HP. So generally this was Chevy's most popular factory high performance small block head of the era.

The Crank #(NNN) NNN-NNNNyou requested I believe if you look closely the first number will be a 3 instead of an 8, because there was never a(NNN) NNN-NNNNcrank, but there was a(NNN) NNN-NNNNcrank. The 3 and 8 are easily confused, because the numbers are often crude. The(NNN) NNN-NNNNcrank is a 3.48 stroke used from 1969 to 1985, it is cast iron, and it is has 2.45 inch main bearings, and 2.10 inch rod bearings. It's most common use was in the chevy 350 engine. It is not correct for the 302 engine.

The other number T0111HB decodes as follows.

T = Towanda engine plant
01 = January
11 =11th day of month
HB Turbo Hydro transmission

The next number 19Z327851
1 = Chevrolet
9 = 1969
Z = Fremont assembly plant
327851 sequence number, (will be the last part of original vehicles VIN)


If you have any more questions I am here to help. Good luck, and Thanks for using Just Answer.


I hope this helps, 100% satisfaction is my goal. If the answer is not clear, please reply and I will assist you more. When you're satisfied, click on accept. I don't get paid unless you do. A bonus and positive feedback are always appreciated, good luck and Thanks.

Edited by DR. Hamman on 4/30/2010 at 8:08 AM EST
Dr. Hamman, Technician
Category: Classic Car
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Experience: I have 30 years experience repairing, restoring, and customizing cars, and pickup trucks.
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Expert:  ASEMaster35yrs replied 4 years ago.

Most of what was posted above is correct except that this engine is a 1969 350ci 300HP engine that came in Camaro,Chevelle and Nova with Turbo hydramatic trans. The block casting number was used for multiple cubi inch engines, 302,327,& 350. The heads were used on 302 & 350 engines, the crank was used on 267,305, and 350 engines from 1968-1985.

See: http://www.ajgeneral.com/chevy_crankshaft_casting_numbers/

The HB on the engine ID was in 65-69 engines but in 1969 it was only on a 350ci 300HP with auto trans for Camaro,Chevelle & Nova.

See: http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-5.php

The heads are hi performance camel hump heads with 63cc chambers and 161/65 ports.

Due to the fact that the crankshaft is what it is confirms it is a 350ci.



Edited by ASEMaster35yrs on 4/30/2010 at 8:53 AM EST
Expert:  Dr. Hamman replied 4 years ago.
Here we have a differing opinion with my data coming directly from GM archives. Also crankshafts can easily be switched, so the crankshaft could have easily been switched in the past 41 years since the engine was built. There is honestly lots of conflicting information out there on these older engines, I personally trust the GM archives over the many pages of data on the internet. If you have any more questions I am here to help. Good luck, and Thanks for using Just Answer.


I hope this helps, 100% satisfaction is my goal. If the answer is not clear, please reply and I will assist you more. When you're satisfied, click on accept. I don't get paid unless you do. A bonus and positive feedback are always appreciated, good luck and Thanks.
Expert:  ASEMaster35yrs replied 4 years ago.

You cannot identify a block by casting number alone, you need three identifiers to properly identify an engine block, casting number, engine ID and date code. Below is an example of common casting numbers used on multiple cubic inch displacement:

 

Common Casting Numbers

1967

(NNN) NNN-NNNN/p>

302

290

290

2

Z-28, small journal

1967

(NNN) NNN-NNNN/p>

327

210

350

2

car & truck

1967

(NNN) NNN-NNNN/p>

350

295

295

2

Camaro

1968

(NNN) NNN-NNNN/p>

302

290

290

2/4

Camaro, Z-28

1968

(NNN) NNN-NNNN/p>

327

210

350

2

car & truck

1968

(NNN) NNN-NNNN/p>

350

295

295

2

Camaro/ChevyII

1969

3932388

302

290

290

4

Z28

1969

3932388

350

300

300

4

cars

1968-69

(NNN) NNN-NNNN/p>

327

-

-

4

A,F,Vette

1969

(NNN) NNN-NNNN/p>

302

290

290

4

Z28

1969

(NNN) NNN-NNNN/p>

327

235

235

2

fullsize

1969

(NNN) NNN-NNNN/p>

350

250

350

2/4

cars

 

For an engine to even be considered a 302 it would have to have one of these suffix codes:

Chevy Small Block Engine Suffix Codes for CID 302

CodeYearCIDHPBBLAppl
CNA 1970 302 290 4 manual trans.
CNB 1970 302 290 4 tur hydramatic
DZ 1968 302 290 4 Z-28, late prod
DZ 1969 302 290 4 m/t, 4 spd
MI 1968 302 290 4 m/t, 4 spd
MO 1968 302 290 4 m/t,4 spd
MO 1967 302 290 4 Spec. High Perf. 4-speed
MP 1967 302 290 4 Z-28, w/A.I.R.

 

The suffix code on your block is HB, here is a list:

HB 1965 327 300 4 std trans., hi perf.
HB 1967 327 275 4 A.I.R.
HB 1968 327 275 4 H.D. clutch
HB 1969 350 300 4 tur hydro trans.
HB 1966 327 275 4 A.I.R.

 

Your crankshaft is consistent with a 350 as your suffix code indicates.

(NNN) NNN-NNNN/p>

350

68-81

Pass,Camaro,Chevelle Corvette,Nova

Cast Iron,Large Journal

(NNN) NNN-NNNN/p>

350

69-85

Truck

Cast Iron,Large Journal

(NNN) NNN-NNNN/p>

305

76-85

Truck

Cast Iron,Large Journal

(NNN) NNN-NNNN/p>

305

76-85

Cast Iron,Large Journal

 

(NNN) NNN-NNNN/p>

267

79-82

Cast Iron,Large Journal

 

 

While 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. 283 blocks (3.875" bore, 2.3" main), 302/327/350 blocks (4" bore, 2.3" or 2.45" mains), and 400 blocks (4.126", 2.65" mains). In 1968 the main bearing saddles were increased in size from 2.3" to 2.45".

 

CHEVY SMALLBLOCK V-8 BORE AND STROKE

262 = 3.671" x 3.10" (Gen. I, 5.7" rod)
265 = 3.750" x 3.00" ('55-'57 Gen.I, 5.7" rod)
265 = 3.750" x 3.00" ('94-'96 Gen.II, 4.3 liter V-8 "L99", 5.94" rod)
267 = 3.500" x 3.48" (Gen.I, 5.7" rod)
283 = 3.875" x 3.00" (Gen.I, 5.7" rod)
293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)
302 = 4.000" x 3.00" (Gen.I, 5.7" rod)
305 = 3.736" x 3.48" (Gen.I, 5.7" rod)
307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)
327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
345 = 3.893" x 3.622" ('97-later, Gen.III, "LS1", 6.098" rod)
350 = 4.000" x 3.48" (Gen.I, 5.7" rod)
350 = 4.000" x 3.48" ('96-'01, Gen. I, Vortec, 5.7" rod)
350 = 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)
364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)
376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)
383 = 4.000" x 3.80" ('00, "HT 383", Gen.I truck crate motor, 5.7" rod)
400 = 4.125" x 3.75" (Gen.I, 5.565" rod)



Edited by ASEMaster35yrs on 4/30/2010 at 8:48 PM EST

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