Engine suffix codes are located on the front right (passenger) side of the block. Included with in this code is the date that the engine was assembled and the plant in which it was assembled. Six cylinder engines have the code stamped on the right side of the block behind the distributor. There are some notes at the end also.
Sample Code: T0211JR
T = Engine Plant (Tonawanda)
02=Month Built (February)
11=Day Built
JR=Powertrain Combination (300hp 327ci)
Engine Plants were either T (Tonawanda) or F (Flint).
Suffixes: (listed in alphabetical order)
BL-230CI Powerglide Trans
BM-230CI Powerglide Trans with A/C
BN-230CI Powerglide Trans and RPO K24
BP-230CI Powerglide Trans with A/C and RPO K24
G-194CI 3spd Trans
GB-194CI 3spd Trans/HD clutch
GF-194CI 3spd Trans with RPO K24
GG-194CI 3spd Trans A/C and RPO K24
GH-194CI 3spd Trans (Taxi only)
GJ- 194CI 3spd Trans with RPO K24 (Taxi only)
GK-194CI 3spd Trans and A/C
GL-194CI 3spd Trans/HD Clutch and A/C
GM-194CI 3spd Trans A/C and RPO K24
GN-194CI 3spd Trans/HD Clutch and A/C
J-283 195HP 3spd Trans
JA-283 195HP 4spd Trans
JD-283 195HP Powerglide Trans
JG-283 220HP Powerglide Trans 4bbl Carb
JH-283 220HP Powerglide Trans 4bbl Carb
JQ-327 250HP Manual Trans
JR-327 300HP Manual Trans HP
JS-327 365HP Manual Trans SHP RPO K66
(COPO very rare, this is RPO L76 )
JT-327 250HP Manual Trans RPO K66 (Rare)
K-194CI Powerglide Trans
KB-194CI Powerglide Trans RPO K24
KC-194CI Powerglide Trans (Taxi only)
KD-194CI Powerglide Trans RPO K24 (Taxi only)
KH-194CI Powerglide Trans A/C
KJ-194CI Powerglide Trans A/C RPO K24
LL-230CI 3spd Trans A/C
LM-230CI 3spd Trans with RPO K24
LN-230CI 3spd Trans A/C RPO K24
SR-327 250HP Powerglide Trans
SS-327 300HP Powerglide Trans 4bbl
Notes:
RPO K24 is closed positive crankcase ventilatilon
RPO K66 is transistor ignition
HD Clutch is RPO M01