| BBC Cylinder Head Casting Numbers | ||||
| RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust | ||||
| Casting # | Years | CID | Chamber | HP/RPO/Comments |
| 3904392 | 1967 | 427 | Closed | 430, 435 L-88/L-89, 106.8cc, 1.72 ex |
| 3919842 | 1968-69 | 396 | 375 L-89 | |
| 427 | Closed | 430, 435 L-88/L-89, 106.8cc, 1.84 ex | ||
| 3946074 | 1969-71 | 396,402 | 375 L-89, 427 430 L-88/ZL-1 | |
| 454 | Closed | 425, 465 LS-6/LS-7, 118.Occ, round ex | ||
| 10051128 | 1990-94 | 454 | Semi Open | 72cc, IP 400cc, bowtie, sym port |
| 14011077 | 1989-94 | 454 | Open | 118.Occ, IP 295cc, replacement, C port |
| 14044861 | 1989-94 | 454 | Open | 425, 105.Occ, IP 380cc, bowtie, W port |
| 3856208 | 1965 | 396 | Closed | 375, 425 Z-16/L-37, 108.9cc, 1.72 ex |
| 3873858 | 1966-67 | 396 | 375 L-78 | |
| 427 | Closed | 425 L-72, 108.9cc, 1.72 ex | ||
| 3904391 | 1965-67 | 396 | 375 L-78 | |
| 427 | Closed | 425, 435 L-71/L-72, 106.8cc, 1.72 ex | ||
| 3919840 | 1967-69 | 396 | 375 L-78, 1.72.ex | |
| 427 | Closed | 425, 435 L-71/L-72, 425 COPO, 106.8cc | ||
| 3964291 | 1969-70 | 396/402 | 375 L-78, Intake Port 325cc | |
| 427 | 425, 435 L-71/L-72 | |||
| 454 | Closed | 450 LS-6, 108.Occ | ||
| 3964292 | 1970 | 454 | Closed | 450 LS-6, 109.Occ |
| 3994025 | 1971 | 454 | Open | 425 LS-6, 118.Occ |
| 3994026 | 1971 | 454 | Closed | 425 LS-6, 118.Occ |
| 6258723 | 1971 | 454 | Open | 425 |
| 6272990 | 1971-94 | 454 | Open | 425, 118.Occ, IP 325cc |
| 14096188 | 1987-94 | 454 | Open | 425, 118.Occ, IP 325cc, replacement |
| 14097088 | 1989-94 | 502 | Open | GEN V, 118.Occ, IP 325cc, replacement |
| OVAL PORT - Valve size 2.06 intake, 1.72 exhaust | ||||
| Casting # | Years | CID | Chamber | HP/RPO/Comments |
| 330864 | 1970-81 | 366/427/454 | Open | |
| 330865 | 1970-84 | 366/427/454 | Open | |
| 336765 | 1973-84 | 427/454 | Open | |
| 336781 | 1973-85 | 454 | Open | 113.0cc |
| 343771 | 1968-85 | 366/427/454 | Open | |
| 343772 | 1976-84 | 366/427/454 | Open | |
| 343783 | 1975-78 | 454 | Open | car & truck |
| 346236 | 1975-87 | 454 | Open | 113.0cc |
| 346238 | 1975-87 | 454 | Open | 113.0cc |
| 353049 | 1970-73 | 402/454 | Open | 113.0cc |
| 473328 | 1968-85 | 366 | Open | |
| 3856206 | 1965-66 | 396 | Closed | 325 97.2cc |
| 3856213 | 1966-70 | 366 | Closed | truck |
| 3872702 | 1966 | 396 | 325, 360 L-34/L-35 | |
| 427 | Closed | 390, L-36 98.4cc | ||
| 3876875 | 1966-70 | 427 | Closed | truck |
| 3904390 | 1966-67 | 396 | 325, 350 L-34/L-35 | |
| 427 | Closed | 390, 400, L-36/L-68 98.4cc | ||
| 3904393 | 1966-68 | 366 | Closed | truck |
| 3909802 | 1966-67 | 396 | 325, 350 L-34/L-35 | |
| 427 | Closed | 385, 390, 400, L-36/L-68 100.9cc | ||
| 3917215 | 1967-69 | 396 | 325, 350 L-34/L-35 | |
| 427 | Closed | 335, 385, 390, 400 100.9cc | ||
| 3917219 | 1966-70 | 366/427 | Closed | truck |
| 3931063 | 1969-70 | 396 | 325, 350 L-34/L-35 | |
| 427 | Closed | 335, 385, 390, 400 100.9cc | ||
| 3933148 | 1969 | 366/396 | Open | 2V/427 265 122.1cc car & truck |
| 3933149 | 1969-70 | 427 | Open | 122.1 cc truck |
| 3964280 | 1966-70 | 427 | 335, 385, 390, 400 | |
| 454 | Closed | 345, 360, 390 LS-5 | ||
| 3964290 | 1969-70 | 396/402 | 325, 330, 350 | |
| 427 | 335, 385,390, 400 | |||
| 454 | Closed | 345, 360, 390 LS-5 100.9cc | ||
| 3965198 | 1969 | 396 | truck | |
| 3975950 | 1968-70 | 366/427 | Closed | truck |
| 3986133 | 1970-85 | 366/427 | Closed | truck |
| 3986136 | 1970-84 | 366/427 | Closed | truck |
| 3993820 | 1971 | 402 | 300, 330 LS-3 | |
| 454 | Open | 365 LS-5 113.0cc | ||
| 3999241 | 1972 | 402 | 240, 300, 330 LS-3 | |
| 454 | Open | 365 LS-5 113.0cc | ||
| 6272292 | 1971 | 402 | 240, LS-3 | |
| 454 | Open | 270, LS-5 | ||
| 10101136 | 1991-94 | 454 | Open | truck |
| 10121033 | 1978-88 | 454 | Open | truck |
| 12352783 | 1979-93 | 454 | Open | truck |
| 14025175 | 1983-93 | 454 | Open | truck |
| 14081044 | 1986-90 | 454 | Open | truck |
| 14092359 | 1986-89 | 427 | Open | truck |
| 14092360 | 1985-89 | 454 | Open | truck |
| 14101398 | 1986-90 | 454 | Open | truck |