1968 Chevelle Engine ID Codes - Engine Pad

[ 1964 ] | [ 1965 ] | [ 1966 ] | [ 1967 ] | [ 1968 ] | [ 1969 ] | [ 1970 ] | [ 1971 ] | [ 1972 ]

Engine

Transmission

Notes

Code

Size-Carb

HP-RPO

    
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 Documented on KC-built 13680 & 13637
Documented on Fremont-built 13637
Documented on Atlanta-built 13637
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-3/4 Spcl High Perf/Heavy Duty Clutch
396 ↓        
ED 396-4 325-L35 Manual-3/4 A.I.R.
EF 396-4 350-L34 Manual-3/4 A.I.R.
EG 396-4 375-L78 Manual-3/4 A.I.R./Spcl High Perf
EK 396-4 325-L35 Powerglide  
EL 396-4 350-L34 Powerglide A.I.R.
ET 396-4 325-L35 TH-400  
EU 396-4 350-L34 TH-400 A.I.R.

A total of 82,845 6-cyl engines were installed; 39,762 230cid and 43,083 250cid engines.
A total of 381,824 8-cyl engines were installed; 245,032 307cid, 74,007 327cid, and 62,785 396cid engines.

The engine assembly date and ID suffix code as well as the partial VIN for all V8 engines is always stamped on the engine pad as shown here. To date, all L6 engines were stamped on a pad by the distributor.

All 350hp and 375hp, regardless of transmission, as well as 325hp manual transmission SS396 Chevelles, came equipped with A.I.R.; the 325hp SS396 with an automatic did not have the A.I.R. system.

* EC engine code found on several KC-built 13680 El Caminos like the late January El Camino on the Chassis Broadcast Copy sheet and Malibu engine stamp shown here, at least 1 Fremont Malibu, and one Atlanta Malibu. The EE engine number was changed to EC due to a Powerglide cooler line clip being added to the pan rail.


So, if you have a documented 1968 327/275 w/Powerglide and an EC engine code, let me know the plant and VIN sequence so I can document it here and maybe solve issues for others.