What We Do Water Haul Outs
GM BIG BLOCK CASTING NUMBERS
Number Size Rated Horsepower Production Main Caps
340220 427 1968-1976 Four-bolt (tall-deck)
346236 454 1975 Two-bolt
361959 454 1978-1987 Two-bolt or four-bolt
364776 427 1974-1976 Four-bolt (tall-deck)
364776 454 1977-1990 Four-bolt (tall-deck)
364779 366 1968-1990 Four-bolt (tall-deck)
473478 427 1977-1990 Four-bolt (tall-deck)
1014183 366 1991-1992 Four-bolt (tall-deck)
3855961 396 325 and 360 1966 Two-bolt
3855962 396 360, 375, and 425 1965-1066 Two-bolt or four-bolt
3869942 427 390 and 425 1966 Two-bolt or four-bolt
3873858 396 375 1966 Four-bolt
3902406 396 325, 350, and 375 1967 Two-bolt or four-bolt
3904351 427 425 1967 Four-bolt
3916321 427 425 and 435 1968 Four-bolt
3916323 396 325, 350, and 375 1968 Two-bolt or four-bolt
3935439 427 435 1968 and 1969 Four-bolt
3935440 396 350 and 375 1969 Two-bolt or four-bolt
3937724 366 1968-1976 Four-bolt (tall-deck)
3955272 396 325, 350, and 375 1969 Two-bolt or four-bolt
3955272 402 325, 350, and 375 1969 Two-bolt or four-bolt
3955274 366 1968-1976 Four-bolt (tall-deck)
3955276 427 1968-1973 Four-bolt (tall-deck)
3963512 454 360, 375, 425, and 460 1968-1971 Two-bolt or four-bolt
3969852 366 1968-1976 Four-bolt (tall-deck)
3969854 402 360 and 375 1972 Two-bolt
3969854 454 360 and 375 1972 Two-bolt
3969858 427 1968-1973 Four-bolt (tall-deck)
3999289 454 1972-1979 Two-bolt
3999290 402 240 1972 Two-bolt
3999293 366 1968-1976 Four-bolt (tall-deck)
3999294 427 1968-1973 Four-bolt (tall-deck)
10114182 454 1992 Four-bolt (tall-deck)
10114184 427 1991-1992 Two-bolt or four-bolt
14015445 454 1978-1987 Two-bolt or four-bolt
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