All engine blocks have a casting code. The codes below will tell you the year during which a specifc casting number was used.In some cases the same casting number is used across various years and have different characteristics like the number of bolts on the mains cap.
The casting numbers can be found in different locations depenging on the year of the block.
1955 – 1963 casting codes are found on the passengers side of the block.
1964 – 1967 casting numbers are found on the distributor pad, except the 421’s
1967 – onward the casting number is found on the rear of the block just behind the number 8 cylinder
|
Casting # |
Year |
CID |
HP |
Main |
Notes |
|
518037 |
1955 |
287 |
173, 180, 200 |
2 |
|
|
521560 |
1956 |
316 |
192, 205, 216, 227, 285 |
2 |
|
|
523293 |
1957 |
347 |
227, 244, 252, 270, 290, 317 |
2 |
|
|
528456 |
1958 |
370 |
240, 255, 270, 285, 300, 315, 330 |
2 |
|
|
532000 |
1959 |
389 |
215, 245, 260, 280, 300, 315, 330 345 |
2 |
|
|
536387 |
1960 |
389 |
215, 230, 235, 281, 283, 303, 318 |
2 |
|
|
536387 |
1960 |
389 |
333, 348, 363 |
4 |
SD |
|
542426 |
1961 |
389 |
|
SR |
|
|
538181 |
1961-62 |
389 |
368, 385 |
4 |
|
|
538181 |
1961-62 |
421 |
373, 405 |
4 |
SD |
|
548913 |
1962 |
421 |
405 |
4 |
SD (late) |
|
543680 |
1963 |
389 |
215, 230, 235, 267.-283, 303, 313 |
2 |
|
|
544988 |
1963 |
421 |
320, 353, 370 |
2 |
|
|
544988 |
1963 |
421 |
390, 405, 410 |
2 |
SD |
|
548211 |
1963 |
326 |
250, 260, 280 |
2 |
|
|
9773153 |
1964 |
326 |
250, 280 |
2 |
|
|
9773155 |
1964 |
389 |
215, 230, 235, 267, 283, 303, 306 |
2 |
|
|
9773156 |
1964 |
326 |
325, 330, 348 |
2 |
|
|
9773157 |
1964 |
421 |
320, 350, 370 |
2 |
|
|
9773383 |
1964 |
389 |
2 |
||
|
9773384 |
1964 |
421 |
2 |
||
|
9778789 |
1965-66 |
389 |
256, 290, 326, 333, 335, 338, 360 |
2 |
|
|
9778791 |
1965-66 |
421 |
338, 350, 256, 376 |
2 |
|
|
9778840 |
1965-66 |
326 |
250, 285 |
2 |
|
|
9782611 |
1966 |
421 |
338, 350, 256, 376 |
2 |
|
|
9786133 |
1967 |
400 |
255, 260, 265, 290, 325, 335, 360 |
2&4 |
|
|
9786135 |
1967 |
428 |
360, 376 |
4 |
|
|
9786339 |
1967 |
326 |
250, 285 |
2 |
|
|
9787840 |
1967 |
326 |
2 |
||
|
9792250 |
1968 |
400 |
2 |
||
|
9792506 |
1968 |
400 |
335, 360 |
4 |
RA |
|
545887 |
1969 |
400 |
4 |
RA5 |
|
|
546313 |
1969 |
303 |
4 |
RA5 short deck |
|
|
9792506 |
1969 |
400 |
4 |
RA4 |
|
|
9792968 |
1969 |
400 |
375 |
4 |
RA5 |
|
9790071 |
1968-69 |
400 |
265, 290, 330, 340, 350, 366 |
2&4 |
|
|
9790079 |
1968-69 |
350 |
265, 320, 325 |
2 |
|
|
9792968 |
1968-69 |
428 |
360, 370, 375, 390 |
2&4 |
|
|
481708 |
1970 |
400 |
4 |
RA5 |
|
|
9799140 |
1970 |
455 |
360, 370 |
2 |
|
|
9799914 |
1970 |
400 |
265, 290, 330, 350 |
2 |
|
|
9799914 |
1970 |
400 |
345, 366 |
4 |
RA3 |
|
9799915 |
1970 |
400 |
370 |
4 |
RA4 |
|
9799916 |
1970 |
350 |
255 |
2 |
|
|
481990 |
1971-72 |
350 |
175, 250 |
2 |
|
|
483677 |
1971-72 |
455 |
200, 250, 280, 325 |
2 |
|
|
483677 |
1971-72 |
455 |
300, 335 |
2&4 |
HO |
|
481988 |
1971-74 |
400 |
200, 250, 265, 300 |
2 |
|
|
485428 |
1971-74 |
455 |
200, 215, 250, 265, 300 |
2&4 |
|
|
485212 |
1972 |
366 |
4 |
||
|
487638 |
1972 |
455 |
2 |
||
|
493482 |
1973 |
455 |
2 |
||
|
490132 |
1973-74 |
455 |
290 |
4 |
SD |
|
488986 |
1973-76 |
350 |
150, 155, 170, 175 |
2 |
|
|
488986 |
1975 |
400 |
2 |
early |
|
|
500557 |
1975 |
400 |
2 |
late |
|
|
500810 |
1975 |
350 |
2 |
late |
|
|
500813 |
1975-76 |
455 |
2 |
||
|
525934 |
1977 |
301 |
135 |
2 |
|
|
568557 |
1977-79 |
400 |
180, 200, 220 |
2 |