1929-1962
Chevrolet L-6 (straight/in-line 6) Overhead Valve Engines
the Stovebolt Six - the Cast-Iron Wonder
casting numbers/code,
sequence/serial numbers/codes

information was obtained from

Hemmings heads & blocks casting numbers
block codes and series/sequence codes from Beck's Machine & Tool on Inliners International
truck sequence/series codes/pre-fixes are nicely presented by John Milliman on The Stovebolt Page
Keith Hardy ( The Old Car Manual Project ) nicely displays engine serial number prefixes and suffixes

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B: the Block casting number, raised numbers found at the upper right of the starter ???

H: the Head casting number, found where ???
S: the engine Sequence code (or prefix to the engine serial number before 1954; prefix/suffix 1954 and later), pressed into the ledge to the rear of the distributor - a link to a variety of Sequence/Serial numbers is often provided
Pass = Passenger

194 c.i.

B: 835501
H: 835503

194 c.i.

B: 835501
H: 836273, 836275

194 c.i.

B: 836409
H: 836273, 836275

194 c.i.

B: 836573
H: 836718

194 c.i.

B: 837231 CA, DA, Master & Truck, 473180 CC Standard, 836915 CB Master Commercial
H: 836961 CA Master, 600569 CC Standard

194 c.i.

B: 837231 CA, DA, Master & Truck, 473741 DC Standard
H: 837230 DA Master, 473740 DC Standard

207 c.i.

194 c.i.

B: 837591
H: 837230, 837682

181 c.i.

207 c.i.

194 c.i.

B: 836010
H: 837981

181 c.i.

207 c.i.

Second Generation 1937-1953
Low-Pressure Oil (internal lubrication) System

216 c.i.

B: 838101, 838710
H: 838355 (early), 838773
S: 1 to 1187821

216 c.i.

B: 838710
H:
S: 1187822 to 1915446 & B1 to B10502

216 c.i.

B: 838941
H: 838773
S: 1915447 to 2697267 & B10503 to B105461

216 c.i.

B: 839132
H: 838773
S: 2697268 to 3665902 & B105462 to B229135

216 c.i.

B: 839400H: 839401
H:
S: AA 100S to AA 1163720 & AC 1001 to AC 19549
additional serial number information at this link

235 c.i.

B: 3660439
H: 839401
S: AG, AL

216 c.i.

B: 839770, 839910, 3835335
H: 839401
S: 2AA, 2AC, BA
additional serial number information at this link

235 c.i.

B: 839751, 839931
H: 839401
S: BG, BL

216 c.i.

B: 839770, 839910, 3835335, 3837012 (Pass), 8335794 (Truck)
H: 839401
S: WWII?

235 c.i.

B: 839751, 839931
H:
S: WWII?

216 c.i.

B: 839770, 839910, 3835335, 3837012 (Pass), 8335794 (Truck)
H: 839401
S: WWII?

235 c.i.

B: 839751, 839931
H:
S: WWII?

216 c.i.

B: 839770, 839910, 3835335, 3837012 (Pass), 8335794 (Truck)
H: 839401
S : WWII?

235 c.i.

B: 839751, 839931
H:
S: WWII?

216 c.i.

B: 839770, 839910, 3835335, 3837012 (Pass), 8335794 (Truck)
H: 839401
S: DA

235 c.i.

B: 839751, 839931
H: 839401
S: BG, BL-1st design;
DDA, DDM, DEA, DEM-2nd design

216 c.i.

B: 839770, 839910, 3835335, 3837012 (Pass), 8335794 (Truck)
H: 839401
S: EA

235 c.i.

B: 3835335, 839751, 839931
H: 839401
B: EDA, EDM, EEA, EEM

216 c.i.

B: 3835253, 3835497, 3837012 (Pass), 8335794 (Truck)
H: 839401
S: FA

235 c.i.

B: 3835309, 839931
H: 839401
S: FDA, FDM, FEA, FEM

216 c.i.

B: 3835253, 3835497, 3837012 (Pass), 8335794 (Truck)
H: 3835409
S: GA

B: 3835309, 839931
H: 3835409
S: GDA, GDM, GEA, GEM

216 c.i.

B: 3835497, 3837012 (Pass), 8335794 (Truck)
H: 3835517,
S: AHCA, AHCM, BHCA, BHCM, HAA, HAM, HAC, HAP, HBA, HBM, HCA, HCM, HCD, HCQ

B: 3692703 Pass Powerglide; 3835499 3692713 Truck
H: 3835909, 3835499

216 c.i.

B: 3835497, 3837012 (Pass), 8335794 (Truck)
H: 3835517
S: AJCA, AJCM, BJCA, BJCM, JAA, JAM, JAC, JAP, JBA, JBM, JCA, JCM, JCD, JCQ

B: 3692703 Pass Powerglide,
3692713 Truck
H: 3835909, 3835499

216 c.i.

B: 3835849, 3835794
H: 3835517
S: AKCA. AKCM, BKCA, BKCM, KAA, KAM, KAC, KAP, KBA, KBM, KCA, KCM, KCD, KCQ

B: 3835692 Powerglide/Truck,
3692713 Truck
H: 3835909, 3835499

216 c.i.

B: 3835849
H: 3835517
S: ALCC. ALCP, BLCC, BLCP, LAG, LAT, LAJ, LAV, LBA, LBM, LCA, LCM, LCC, LCP, LCD, LCQ, LCH, LCU

B: 3701946, 3701483
H: 3701887
S: LDA, LDM, LEA, LEM, LAA, LAM, LAC, LAP

235 c.i.

 

Third Generation 1954-1962
High-Pressure Oil System (internal lubrication)

235 c.i.

B: 3701481, 3702436, 3835911 Powerglide, Pass: 5845363 (PG?), 3835911 (Corvette), (and, maybe 3701488 - Corvette)
H: 3835913, 3836241 (Corvette)
S: Truck: T54 OR F54 FOLLOWED BY: L, LA, M, MA, MB, N, P, Q, R, S, T, TA, U, UA, UB, X, XZ, XB, Y, YE, YG, Z, ZC, ZE, ZH Pass??

261 c.i.

B: 3703414, 3702436, 3703414
H: 3635499 ???, 3703570, 3836850
S: F54Q, T54Q (5000 series); F54N, T54N (6000 series)

235 c.i.

B: 3835911, Truck 3733949 (1st), 3836233 Powerglide; 3702436, Pass: 3838004, 3835911 (Corvette)
H: 3835913, 3836241 (Corvette)
S: Z, ZC (HD clutch), Y (Powerglide), YG (Corvette), ZH (Aluminum cam gear), ZJ (HD clutch & cam gear)

261 c.i.

B: 3733950, 3836340, 3837012
H: 3703570, 3836850
S: 1st series:
F55Q, F54Q55 (5000 series)
F55N, F54N55 (6000 series)
S: 2nd series:
F255N. T255N (6000 series)

235 c.i.

B: Truck: 3836233, 3764476; Pass: 3838004
H: 3836848
S: X, XA, XB; XG, XGA & XGB (Hydra-Matic); W, WA; V, VA, VB (HD clutch); UA, UB , UD

261 c.i.

B: 3733950, 3836340, 3837012, 3738813
H: 3703570, 3836850
S: F56TA, F56TD (P.T.) (6000 series)

235 c.i.

B: Truck: 3764476; Pass: 3838004
H:
S: Pass: A (3-speed), AD (HD clutch), B (Powerglide)
S: Truck: H, HD (Hydra-Matic), HE (HD clutch), J (Updraft carb), JA (Updraft carb & Hydra-Matic)

261 c.i.

B: 3733950, 3836340, 3837012
H: 3703570, 3836850
S: K

235 c.i.

B: Truck: 3764476, 3738307, 3769716, 3739716; Pass: 3738307
H:
S: Sequence/Serial numbers from OCMP

261 c.i.

B: 3836340, 3739365, 3739365, 3769717
H: 3836850
S: OCMP

235 c.i.

B: Truck: 3764476, 3738307, 3769716, 3739716; Pass: 3738307
H:
S: Serial/Sequence numbers from OCMP

261 c.i.

B: 3836340, 3739365, 3739365, 3769717, 3769925
H: 3836850
S: OCMP

235 c.i.

B: Truck: 3764476, 3769716, 3739716; Pass: 3738307
H:
S: Truck F0361A

261 c.i.

B: 3836340, 3739365, 3769717, 3769925, 3769923
H: 3836850
S:

B: Truck: 3764476, 3769716, 3739716; Pass: ??
H:
S: Truck F1204J

261 c.i.

B: 3836340, 3739365, 3769717, 3769925, 3769923
H: 3836850
S:

B: Truck: 3764476, 3769716, 3739716; Pass: ??
H:
S:

261 c.i.

B: 3836340, 3739365, 3769717, 3769925, 3769923
H: 3836850
S: