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
0712 = July 12
ED = 396/325 L35 Manual 3/4-speed

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  
BA 230-1 140 Manual-3 Overdrive
BB 230-1 140 Manual-3 Heavy Duty Clutch/A.C.
BC 230-1 140 Manual-3 Heavy Duty Clutch
BD 230-1 140 Manual-3 A.C.
BF 230-1 140 Powerglide  
BH 230-1 140 Powerglide A.C.
250 ↓        
CM 250-1 155-L22 Manual-3 Overdrive
CN 250-1 155-L22 Manual-3 A.C.
CQ 250-1 155-L22 Powerglide  
CR 250-1 155-L22 Powerglide A.C.
307 ↓        
DA 307-2 200 Manual-3 Overdrive
DB 307-2 200 Manual-4  
DE 307-2 200 Powerglide  
DF 307-2 200 Powerglide  
DN 307-2 200 Manual-3 Heavy Duty Clutch
327 ↓        
EA 327-4 275-L30 Manual-3/4  
EC 327-4 275-L30 Powerglide  
EE 327-4 275-L30 Powerglide  
EH 327-4 250-L73 Manual-3/4  
EI 327-4 250-L73 Powerglide  
EJ 327-4 250-L73 Manual-3 Heavy Duty Clutch/L73
EO 327-4 275-L30 Manual-3 Heavy Duty Clutch
EP 327-4 325-L79 Manual-3/4 Spcl High Perf
ES 327-4 325-L79 Manual-3 Spcl High Perf/Heavy Duty Clutch
396 ↓        
*ED 396-4 325-L35 Manual-3/4  
EF 396-4 350-L34 Manual-3/4  
EG 396-4 375-L78 Manual-3/4  
EK 396-4 325-L35 Powerglide  
EL 396-4 350-L34 Powerglide  
ET 396-4 325-L35 TH-400  
EU 396-4 350-L34 TH-400