This article will cover the majority of Dodge, Chrysler, and Plymouth V8 engines from 1958 through 1993. We have compiled a list of the casting numbers for both the cylinder heads and engine blocks, to be used as a reference when searching the junkyard. It will cover the following five engine families:
A-Series: The A-series engine was a small-block Mopar (SBM) engine produced from 1956 through 1967. The A-series cylinder heads featured polyspheric (not hemispheric as found in the FirePower engines) combustion chambers, which led to them being referred to as Poly engines. It came in 277 cubic-inch, 301 cubic-inch, 303 cubic-inch, 313 cubic-inch and 318 cubic-inch displacements, along with a Dodge-specific variant measuring 325 cubic inches, but called a 326.
LA-Series: The A-series’ successor, the LA-series engines are small-block Mopars which came on scene in 1964 and lasted until 1992. A modernized version of the LA-series, dubbed “Magnum” carried the design all the way into the new millennium, finally coming to an end in 2003. The LA engines featured a “wedge” style combustion chamber as opposed to the A-series’ polyspheric chambers. The V8 versions of the LA-series started off with a 273 cubic-inch variant, followed by 318 cubic-inch, 340 cubic-inch, and 360 cubic-inch variants.
B-Series: The B-series engine is Chrysler’s first official big-block engine. Released in 1958, they existed until 1978. Available in 350 cubic-inch and 361 cubic-inch variants at first, there were also 383 cubic-inch and 400 cubic-inch B-series engines. They shared most of their architecture with the RB-series, but with a shorter 3.375-inch stroke. Both the B and RB-series engines featured wedge-style combustion chambers.
RB-Series: The RB-series engines came about a year after the B-series, and featured a longer 3.75-inch stroke for increased displacements of 383 cubic inches, 413 cubic inches, 426 cubic inches and 440 cubic inches. The 426 Wedge was Chrysler’s main performance engine until the 426 Hemi came on scene.
426 Hemi: The 426 Hemi was actually the second generation of hemispherical-headed engines, but were the first ones to actually be given the name of “Hemi.” It was released in 1964 and lasted until 1971. The iconic Mopar performance engine only existed in a 426 cubic-inch displacement in production vehicles, and is probably the rarest of any on this list.
CYLINDER HEADS
The casting numbers for small-block Mopar and big-block Mopar are a seven-digit number, which is raised, and usually found in one of two locations. The first would be on the top of the intake runner, under the valve cover. The second location is on the underside of the intake runner on the cylinder head.
LA Small-Block Mopar Cylinder Head Casting Numbers
2268341 – 1962-1967, 318 LA-series small-block, 1.84/1.56 valves
2465315 – 1964-1965, 273 LA-series small-block, 1.78/1.50 valves
2532080 – 1964-1965, 273 LA-series small-block, 1.78/1.50 valves
2536178 – 1966, 273 LA-series small-block,1.78/1.50 valves, early
2658234 – 1966, 273 LA-series small-block,1.78/1.50 valves, late
2658920 – 1967, 273 LA-series small-block, 1.88/1.50 valves
2658920 – 1967, 318 LA-series small-block, 1.78/1.50 valves
2658234 – 1967, 318 LA-series small-block, 1.78/1.50 valves
2843675 – 1967, 318 LA-series small-block, 1.78/1.50 valves
2843675 – 1968-1969, 273 LA-series small-block, 1.78/1.50 valves
2531894 – 1968-1970, 340 LA-series small-block, 2.02/1.60 valves
3418915 – 1970, 340 LA-series small-block, 2.02/1.60 valves, 63cc-73.5cc, T/A
3418915 – 1970-1972, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
3418915 – 1971-1972, 340 LA-series small-block, 1.88/1.60 valves
3462598 – 340 LA-series small-block, Trans-Am, 63cc-73.5cc
3671587 – 1973, 340 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
3671587 – 1973-1974, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
3769950 – 1975-1978, 318 LA-series small-block, 1.78/1.50 valves, w/ air pump
3769974 – 1975-1976, 360 LA-series small-block, 1.88/1.60 valves
3769973 – 1975-1983, 318 LA-series small-block, 1.78/1.50 valves
4006335 – 1975-1978, 318 LA-series small-block, w/o air pump
4027591 – 1975-1978, 318 LA-series small-block, 1.78/1.50, w/ air pump
4006337 – 1976-1976, 360 LA-series small-block, 1.88/1.60 valves, 2bbl w/o air pump
3671587 – 1976, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
4027569 – 1977-1986, 360 LA-series small-block, 1.88/1.60 valves
4027163 – 1977-1986, 318 LA-series small-block, 1.78/1.50 valves
4027593 – 1977-1984, 318 LA-series small-block, 1.78/1.50 valves
4027594 – 1977-1978 360 LA-series small-block, 1.88/1.60 valves, 4bbl w/ air pump
4027163 – 1980, 318 LA-series small-block, 1.78/1.50 valves
4027596 – 360 LA-series small-block, 1.88/160 valves, 66cc-72.5cc
4027596 – 318 LA-series small-block, 1.88/160 valves, 66cc-72.5cc, High Performance
4041001 – 318 LA-series small-block, 1.78/1.50 valves, w/o air-pump
4041003 – 1976-1981, 360 LA-series small-block, 1.88/1.60 valves, 2bbl van and truck, w/o air pump
4071047 – 1977-1978, 360 LA-series small-block, 1.88/1.60 valves, 4bbl w/ air pump
4071051 – 1977-1980, 360 LA small-block, 1.88/1.60 valves
4071051 – 1981-1983, 318 LA-series small-block, High Performance
4100405 – 1979-1981, 318 LA-series small-block 1.78/1.50 valves, w/ air pump
4100408 – 1979-1980, 360 LA-series small-block 1.88/1.60 valves, 4bbl w/ air pump
4100409 – 1979 360, LA-series small-block 1.88/1.60 valves, 4bbl w/o air pump
4100409 – 1979-1980, 360 LA-series small-block 1.88/1.60 valves, 4bbl w/ air pump
4323302 – 1985-1986, 318 LA-series small-block, 1.78/1.50 valves, Fast Burn, 56cc -65cc
4323345 – 1983-1986, 318 LA-series small-block, 1.78/1.50 valves, Police, roller, 69cc – 77cc
4323475 – 1985-1987 318 LA-series small-block, 1.88/1.60 valves, 69cc -77cc, 4bbl
B/RB Big-Block Mopar Cylinder Head Casting Numbers
1406740 – 1958-1959, 361 B/RB-series big-block, 1.94/1.60 valves, HD, Truck
1737622 – 1958-1960, 350/361/383 B/RB-series big-block, 1.94/1.60 valves, 73.5cc
1737635 – 1958, 350/36, B/RB-series big-block, 1.94/1.60 valves, 73.5cc
1737637 – 1958-1959, 361 B/RB-series big-block, 1.94/1.60 valves
1844705 – 1958-1959, 350/361/383, B/RB-series big-block, 1.94/1.60 valves, 73.5cc
1851524 – 1958-1971, 350-413 B/RB-series big-block, Truck
2202594 – 1958-1971, 350-413 B/RB-series big-block, Truck
1944705 – 1958-1959, 361 B/RB-series big-block, 1.94/1.60 valves
1851509 – 1959, 361/383/413 B/RB-series big-block, 2.08/1.60 valves, HP
1737637 – 1960, 383 B/RB-series big-block, 1.94/1.60 valves
2264547 – 1960-1971, 361/413 B/RB-series big-block, Truck
2128521 – 1960-1961, 361/383/413 B/RB-series big-block, 2.08/1.60 valves, 73.5cc, 300F
2128522 – 1960-1961, 361/383, B/RB-series big-block, 1.94/1.60 valves, 73.5cc
2899913 – 1960-1971, 413 B/RB-series big-block, Truck
2206324 – 1961-1962, 361/383/413 B/RB-series big-block, 2.08/1.60 valves
2206924 – 1961-1962, 361/383/413 B/RB-series big-block, 2.08/1.60 valves, 73.5cc, 300H
2402286 – 1962, 413 B/RB-series big-block, 2.08/1.88 valves, Max Wedge, 81cc
2402557 – 1963, 413 B/RB-series big-block, 2.08/1.74 valves, 73.5cc, 300J/early K
2406209 – 1963, 413 B/RB-series big-block, 2.08/1.88 valves, Max Wedge, 81cc
2406740 – 1963-1968, 361, 413 B/RB-series big-block, Truck and Marine
2463209 – 1963, 426 B/RB-series big-block, 2.08/1.88 valves, Max Wedge
2463200 – 1963, 361/383/413 B/RB-series big-block, 2.08/1.60 valves, 73.5cc
2406516 – 1964-1967, 361/383 B/RB-series big-block, 2.08/1.60 valves, 73.5cc, 300L
2406518 – 1964, 426 B/RB-series big-block, 2.08/1.88 valves, Max Wedge, 86cc
2408520 – 1964, 413 B/RB-series big-block, 2.08/1.60 valves, 73.5cc, 300K w/ Ram intake
2268341 – 1965, 426 B/RB-series big-block
2406780 – 1965-67 383 B/RB-series big-block, Truck
2406158 – 1967, 440 B/RB-series big-block, 2.08/1.60 valves, 73.5cc
2708915 – 1967 440 B/RB-series big-block, 2.08/1.74 valves, 73.5cc, HP
2780915 – 1967, 440 B/RB-series big-block, 2.08/1.74 valves, HP
2843906 – 1968-1970, 383/440 B/RB-series big-block, 2.08/1.74 valves
2951250 – 1968, 440 B/RB-series big-block, 2.08/1.74 valves, 79.5cc
3462346 – 1971-1972, 383/400/440 B/RB-series big-block, 2.08/1.74 valves, 79.5cc
2466676 – 1971-1977, 361/413 B/RB-series big-block, Truck and Marine
2899943 – 1971-1977, 361/413 B/RB-series big-block, Truck
3462345 – 1972-1973, 400/440, B/RB-series big-block, 2.08/1.74 valves, Emissions
3462346 – 1973, 400/440 B/RB-series big-block, 2.08/1.74 valves. 81.5cc
3751213 – 1973, 400/440 B/RB-series big-block, 2.08/1.74 valves, Motor Home
3769902 – 1974, 400/440 B/RB-series big-block, 2.08/1.74 valves
3769975 – 1975, 400/440 B/RB-series big-block, 2.08/1.74 valves, 83.1cc
4006452 – 1976-1978, 400/440 B/RB-series big-block, 2.08/1.74 valves, 81.5cc
4021051 – 1977-1986, 360 B/RB-series big-block, 1.88/1.60 valves
2806887 – 426 B/RB-series big-block, Marine and Industrial
3614476 – MOPAR Stage IV, B/RB-series big-block, 2.08/1.74 valves
4286526 – MOPAR Stage V, B/RB-series big-block, 2.08/1.74 valves
426 Hemi Cylinder Head Casting Numbers
2468016 – 1964 426 Hemi, 2.25/1.94 valves
2488596 – 1964 426 Hemi, early production/prototype race head
2531110 – 1965 426 Hemi, 2.25/1.94 valves, (SS) – Aluminum (Alcoa)
2531695 – 1965 426 Hemi, 2.25/1.94 valves, (SS) – Aluminum (Alcoa) Rev B
2531718 – 426 Hemi, A-148
2780559 – 1966-1971, 426 Hemi, 2.25/1.94 valves
2945270 – 426 Hemi, Cast Iron, D3
3512015X – 426 Hemi, D4
3614433 – 426 Hemi, Aluminum
ENGINE BLOCKS
Casting numbers for the small-block Mopar and big-block Mopar engine blocks can be found on the left (driver’s) side of the block, and will consist of seven numerals. These numbers are different than the stamped eight-digit number found on the right side of the engine. That number is the last eight digits of the Vehicle Identification Number. When identifying the block, you want the raised seven-digit number, not the stamped eight-digit number.
Small-Block Mopar Engine Block Casting Numbers
2264230 – 1960-1967, 318 A-series small-block
2463252 – 273 LA-series small-block
2465330 – 1964-1966, 273 LA-series small-block
2466090 – 318 LA-series small-block
2468230 – 318 A-series small-block
2532630 – 318 A-series small-block
2536030 – 1967-75, 318 LA-series small-block
2536130 – 1965, 273 LA-series small-block
2566080 – 318 LA-series small-block
2780930 – 1968-1973, 340 LA-series small-block, Not T/A or AAR
2806030 – 1966-1969, 273 LA-series small-block
2806030 – 1961-1974, 318 LA-series small-block
2806130 – 1965-1969, 273 LA-series small-block
3418496 – 1971-1974, 360 LA-series small-block
3577130TA – 1970-1971, 340 LA-series small-block, T/A and AAR
3810230 – 1975-1978, 360 LA-series small-block
4104230 – 318 LA -series small-block, Race Engine
4179930 – 1975 – 1993, 360 LA-series small-block
Big-Block Mopar Engine Block Casting Numbers
1944929 – 1958, 350 B-series big-block
1737629 – 1961-1964, 361 B-series big-block
1851629 – 1961, 413 RB-series big-block
1851729 – 1959-1964, 383 B-series big-block
1852029 – 1962, 413 RB-series big-block
1852029 – 1962-1963, 413 RB-series big-block
1852029 – 1962-1965, 426 RB-series big-block
1945429 – 1965, 361 B-series big-block
2120229 – 361 B-series big-block
2120329 – 1959-1960, 383, RB-series big-block
2120429 – 361, B-series big-block
2120529 – 1959-1965, 413, RB-series big-block
2128854 – 1964, 361/383, B-series big-block
2205697 – 1959-1965, 413/426 RB-series big-block
2205712 – 1958-1966, 361B-series big-block
2406730 – 1963-1965, 426 RB-series big-block , Wedge/Max Performance Wedge
2432230 – 1964-1966, 426 RB-series big-block, Wedge/Max Performance Wedge
2440873 – 426 RB-series big-block
2468030 – 413/426 RB-series big-block
2468130 – 1959-1971, 383 B-series big-block
2468330 – 1964-1965, 426 RB-series big-block
2468330 – 1966-1971, 426 RB-series big-block, HEMI
2532130 – 1965, 383 B-series big-block
2532230 – 1964-1966, 426 RB-series big-block, Wedge
2536430 – 1966-1972, 440 RB-series big-block
2568130 – 1959-1971, 383 B-series big-block
2658836 – 426, RB-series big-block, Commercial
2658930 – 1965, 361 B-series big-block
2899830 – 1970, 383 B-series big-block
3614230 – 1971-1972, 400 B-series big-block
3698330 – 1973-1978, 440 RB-series big-block
3698630 – 1973-1978, 400 B-series big-block
3698830 – 1972-1978, 440 RB-series big-block
4006530 – 1976-1978, 400 B-series big-block
4006630 – 1975-1978, 440 RB-series big-block
426 Hemi Engine Block Casting Numbers
2468330 – 1964-1971, 426 Hemi