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Buick Nailhead Casting Numbers, 264, 322, 364, 401, 425

Block Cast # Year Displacement
1165165 53-56
322
1165752 54-55
264
1169334 56-59
322
1173201 59-61
364
1174372 59-60
364
1185404 61-66
401
1185484 59-66
401
1196546 61
401
1196547 61
364
1340146 63-66
425
1345404 59-66
401
1346046 61-66
401
1349046 62-66
401
1354713 64-66
425
1354714 64-66
401/425
1364704 63-66
425
1364705 64-66
401/425
1364705 63-66
425
1364707 63
425
1364714 59-66
401
*Chev truck
Head Cast # Year Displacement
1165549 53-56
264/322
1166349 53-56
264/322
1168930 56
322
1169349 56
322
1172889 57-61
364
1175109 56-59
322*
1185485 61-66
401/425
1190415 62-66
364/401/425
1196914 63-66
364/401/425
1343840 53-56
322
1374603 64-66
401/425
1376912 66
401/425
*Chev truck
INTAKE MANIFOLD
Cast # Part # Year Displacement
36387  -    
4bbl
343241  -  '63  
401 4bbl
1343985 1162286 53
322 4bbl
- 1163206 54-55
322 4bbl
1165308 1165308 53-55
264, 322 2bbl
1165384 1165384 55
322 4bbl
- 1169189 man. trans. 55
322 2bbl
- 56
322
1170616 1170624=40 55-56
322 2bbl
1170617 1170625=50/60/70 55-56
322 4bbl
- 1175327= 59-61
364 2bbl
- 1175328= 57-61
364 4bbl
1173313 57-61
364 4bbl
1185976 - '63
401 4bbl
- 1187708=46/47/4800 59-62
401 4bbl
- 1349425= 62
401 2bbl
- 1354966= 61
401 2bbl
- 1358983= 61-63
401 4bbl
- 1356950= 63
401 2bbl
1353240
-
-
1353241 63
401 4bbl
- 1355410= 63
401 4400 OMIT ON HP
- 1353531= 63
401 4400 HP 46-47-4800
1363782 62
4bbl
1355409 - 62-63
401
1357106 64
425 2x4bbl
- 1357106= 64
401-425 2x4bbl
1370316B 1370316= 65-66
425 2x4bbl
1372113 1375118= 66
401hp 425
4bbl Rochester
1363782 1375548= 64-66
401-425 4bbl
1375549 63
425
 
EXHAUST MANIFOLD
Cast # Part # Year Displacement
- 1165212= right 54-55
264/322
- 1172392left -
322
1167750 1175575 left 56
322
1167833 1175576= right 56 and series 70
322
1167833 1175581= left 56 DUAL series 70
322
- 1185463= left 57-58 DUAL
364
- 1185602= right 59-60
364, 401
1186505 1186503= left 59-60
364, 401
- 1186291= DUAL left 59-60
364, 401
1173844 1187336= right 57-58 RM, Limited
364
1345464 1345564= right 53
322
1345465 1345565= left 53-54
322
- 1347776= right on 62 61-62
364, 401
- 1193697= left 61-63 40-41-4300
364, 401
- 1196974= right 61 44-46-47-4800
364, 401
- 1345435right -
322
1348347 1348477=left 62-64
401
- 1356754= right 63
V-8 40-41-4400
- 1356568= left 63
401
- 1359689= left 64
V-8 40-41-42-43-4400
- 1354178= right 64
V-8 40-41-42-43-4400
- 1355435right
-
322
- 1355465right
-
322
- 1351702= right 62
401
- 1356756 left
-
-
- 1361860right
-
401, 425
1366827 1367159= left 65-66
401, 425
- 1372319= left 65-66 GS
401
- 1377476= right 65-66 GS
401
1377482 1377480= right 64-66
401, 425
- 1396568= right 63
44-46-47-4800
 
322 8 3/8"
364 8 7/8"
401-425    9 1/8"

A letter or number after the casting number as in 1165165 X or -3 may indicate a change in update in the casting. This would mean a higher letter would be a later production.

Looking at an aftermarket nailhead manifold and wondering what it will fit? Try this, measure between the bolt holes...
contributed by Steve Berry, Airy Cat

 

A letter or number after the casting number as in 1165165 X or -3 may indicate a change in update in the casting. This would mean a higher letter would be a later production.