ENGINE IDENTIFICATION

The engine identification code consists of the engine assembly plant, the engine assembly date, and a 2 or 3 letter suffix indicating the cubic inch displacement, the horsepower rating, and generally, what type of transmission was to be installed with the engine. Manual transmissions required a bushing in the rear of the bellhousing where an automatic transmission did not. Many engine "accessories" such as the carburetor, distributor, and exhaust manifolds were not installed at the engine assembly plant but rather at the final assembly plant.

T = Tonawanda Engine Plant
1104 = November 4
JK = 396/325 L35 w/TH400

Engine Assembly Plant - 1st letter

Code Assembly Plant
 V Flint, Michigan
*T Tonawanda Engine Plant
   
Assembly Month - 1st and 2nd numbers
Number Month Number Month
01 January 02 February
03 March 04 April
05 May 06 June
07 July 08 August
09 September 15 October
*11 *November 12 December
       

Assembly Day - 3rd and 4th numbers
01...31
 

Engine

Transmission

Notes

Code Size HP  
AD 230-1 140 TH-350  
AM 230-1 140 Manual-3/4  
AN 230-1 140 Powerglide  
AO 230-1 140 TH-350  
AP 230-1 140 Standard A.C.
AQ 230-1 140 Powerglide A.C.
AR 230-1 140 TH-350 A.C.
AS-AU 230-1   Manual-3 Low Compression Engine
AT 230-1   Powerglide Low Compression Engine
AV 230-1   Manual-3 Low Compression Engine, A.C.
250 ↓        
BB 250-1 144-L22 Powerglide
Torque Drive
 
BC 250-1 144-L22 Powerglide A.C.
BD 250-1 144-L22 TH-350  
BE 250-1 144-L22 Manual-3  
BF 250-1 144-L22 Standard A.C.
BH 250-1 144-L22 TH-350 A.C.
BI-BJ 250-1   Powerglide Low Compression Engine
BK-BW 250-1   Manual-3 Low Compression Engine
307 ↓        
DA 307-2 200 Manual-3/4  
DC 307-2 200 Powerglide  
DD 307-2 200 TH-350  
DE 307-2 200 Manual-4  
FS 307-2   Manual-3 Low Compression Engine
FT 307-2   Powerglide Low Compression Engine
350 ↓        
HA 350-4 300-L48 Manual-3/4  
HB 350-4 300-L48 TH-350  
HC 350-2 250-L65 Standard  
HD 350-2 250-L65 TH-350  
HE 350-4 300-L48 Powerglide  
HF 350-2 250-L65 Powerglide  
HP 350-4 300-L48 Standard Heavy Duty Clutch
HQ 350-4 255-LM1 Manual-3/4  
HR 350-4 255-LM1 Powerglide  
HS 350-4 255-LM1 TH-350  
396 ↓        
JA 396-4 325-L35 Manual-3/4  
JC 396-4 350-L34 Standard  
JD 396-4 375-L78 Standard  
JE 396-4 350-L34 TH-400  
*JK 396-4 325-L35 TH-400  
JV 396-4 325-L35 Manual-3/4 Heavy Duty Clutch
KB 396-4 350-L34 Manual-3/4 Heavy Duty Clutch
KD 396-4 375-L78 Standard Heavy Duty Clutch
KF 396-4 375-L78 TH-400  
KG 396-4 375-L89 Standard Aluminum Heads
KH 396-4 375-L89 TH-400 Aluminum Heads
KI 396-4 375-L89 Manual-3/4 Heavy Duty Clutch,
Aluminum Heads *
402 ↓        
CJA 402-4 325-L35 Standard  
CJC 402-4 350-L34 Standard  
CJD 402-4 375-L78 Standard  
CJE 402-4 325-L35 TH-400  
CJK 402-4 350-L34 TH-400  
CJV 402-4 325-L35 Manual-3/4 Heavy Duty Clutch
CKB 402-4 350-L34 Manual-3/4 Heavy Duty Clutch
CKD 402-4 375-L78 Standard Heavy Duty Clutch
CKF 402-4 375-L78 TH-400  
CKG 402-4 375-L89 Standard Aluminum Heads
CKH 402-4 375-L89 TH-400 Aluminum Heads
CKI 402-4 375-L89 Manual-3/4 Heavy Duty Clutch,
Aluminum Heads *
427 ↓        
MP 427-4 425-L72 TH-400 COPO
MQ 427-4 425-L72 Manual-4 COPO

* Tonawanda does not show this engine in their production reports but information presented here is from Alan L. Colvin's "...by the numbers..." reference book.