RB, B, LA Engine Casting Numbers
The block casting numbers for all RB, B, and LA engines are found on the left (driver) side of the block. In addition, on 1968 and later engines the numbers stamped on the lower rail of the engines right (passenger) side match the last 8 digits of the cars vehicle identification number.
Casting Number on LH Side of Engine
VIN Number Stamped on RH Engine Pad
Casting Number
CID
Year
Type
Remarks
2465330
273
1964-66
LA
2536130
273
1965
LA
2466090
318
1967-74
LA
2806030
318
1967-74
LA
2536030
318
1967-75
LA
2566080
318
LA
2780930
340
1968-73
LA
Except T/A & AAR
3577130TA
340 - 6 bbl
1970
LA
T/A & AAR
3418496
360
1971-74
LA
3870230
360
1975-
LA
1737629
361
1961-64
B
2120329
361
1958-66
B
2205712
361
1958-66
B
2120229
361
B
Industrial
1852029
413
1962
RB
Max Perf. & Truck
2120529
413
1959-65
RB
2205697
413
1959-65
RB
Passenger Car
2468030
413
RB
2205697
426
1964
RB
Passenger Car
2406730
426
1963-65
RB
Wedge & Max Perf.
1851729
383
1959-64
B
2120329
383
1959-64
B
2568130
383
1959-71
B
2468330
426
1964-71
RB
Hemi Head
2532230
426
1964-66
RB
Wedge & Max Perf.
2536430
440
1966-72
RB
2658836
426
RB
Industrial
3614230
400
1971-72
B
3698630
400
1973-78
RB
3698830
440
1973-78
RB
4006530
400
1976-78
B
4006630
440
1978
RB
Mopar Head Casting Numbers 1959-1978
The casting numbers for most RB, B, and LA heads are found in two places. On the underside of the head on an intake runner, and under the valve cover on an intake runner.
Casting Number Under Valve Cover on Intake Runner.
Casting Number on the Underside of Head on Intake Runner.
|
LA Engine Cylinder Heads Casting Numbers | ||||
| Casting Number | Engine CID | Year | Intake | Exhaust |
| 2465315 | 273 | 1964-65 | 1.78 | 1.50 |
| 2536178 | 273 | 1966 | 1.78 | 1.50 |
| 2658920 | 273 | 1967 | 1.78 | 1.50 |
| 2843675 | 273 | 1968-69 | 1.78 | 1.50 |
| 2658920 | 318 | 1967 | 1.78 | 1.50 |
| 2658234 | 318 | 1967 | 1.78 | 1.50 |
| 2843675 | 318 | 1968-74 | 1.78 | 1.50 |
| 3769973 | 318 | 1975-83 | 1.78 | 1.50 |
| 4027163 | 318 | 1977-86 | 1.78 | 1.50 |
| 4027593 | 318 | 1977-84 | 1.78 | 1.50 |
| 4323302 | 318 Fast Burn | 1985-86 | 1.78 | 1.50 |
| 4323345 | 318 Police | 1983-86 | 1.78 | 1.50 |
| 2531894 | 340 | 1968-70 | 2.02 | 1.60 |
| 3418915 | 340TA | 1970 | 2.02 | 1.60 |
| 3418915 | 340 | 1971-72 | 1.88 | 1.60 |
| 3671587 | 340 | 1973 | 1.88 | 1.60 |
| 3418915 | 360 | 1970-72 | 1.88 | 1.60 |
| 3671587 | 360 | 1973-74 | 1.88 | 1.60 |
| 3769974 | 360 | 1975-76 | 1.88 | 1.60 |
| 3671587 | 360 | 1976 | 1.88 | 1.60 |
| 4027569 | 360 | 1977-86 | 1.88 | 1.60 |
| RB/B Engine Cylinder Heads Casting Numbers | ||||
| Casting Number | Engine CID | Year | Intake | Exhaust |
| 4021051 | 360 | 1977-86 | 1.88 | 1.60 |
| 1737637 | 361 | 1958-59 | 1.94 | 1.60 |
| 1944705 | 361 | 1958-59 | 1.94 | 1.60 |
| 1737637 | 383 | 1960 | 1.94 | 1.60 |
| 2206324 | 361/383/413 | 1961-62 | 2.08 | 1.60 |
| 2206924 | 361/383/413 | 1961-62 | 2.08 | 1.60 |
| 2463200 | 361/383/413 | 1963 | 2.08 | 1.60 |
| 2406516 | 361/383 | 1964-67 | 2.08 | 1.60 |
| 2402286 | 413 Max Wedge | 1962 | 2.08 | 1.88 |
| 2463209 | 426 Max Wedge | 1963 | 2.08 | 1.88 |
| 2406518 | 426 Max Wedge | 1964 | 2.08 | 1.88 |
| 2406158 | 440 | 1967 | 2.08 | 1.60 |
| 2780915 | 440HP | 1967 | 2.08 | 1.74 |
| 2843906 | 383/440 | 1968-70 | 2.08 | 1.74 |
| 2951250 | 440 | 1968 | 2.08 | 1.74 |
| 3462346 | 383/400/440 | 1971-72 | 2.08 | 1.74 |
| 3462346 | 400/440 | 1973 | 2.08 | 1.74 |
| 3751213 | 400/440 Motor Home | 1973 | 2.08 | 1.74 |
| 3769902 | 400/440 | 1974 | 2.08 | 1.74 |
| 3769975 | 400/440 | 1975 | 2.08 | 1.74 |
| 4006452 | 400/440 | 1976-78 | 2.08 | 1.74 |
| Hemi Engine Cylinder Heads Casting Numbers | ||||
| Casting Number | Engine CID | Year | Intake | Exhaust |
| 2468016 | 426 Hemi | 1964 | 2.25 | 1.94 |
| 2531110 | 426 Hemi (SS) - Aluminum | 1965 | 2.25 | 1.94 |
| 2780559 | 426 Hemi | 1966-71 | 2.25 | 1.94 |
