Thread: Bbc id

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Originally Posted by cffisher

Trying to ID this BBC the casting number is 10069286 the vin # is 1GCGC34NOJE175737 Thanks

are you shure its not a 289 casting if so it is a mark 4 block

Pat are we to assume that this listing is incorrect, just trying to keep from makeing a costly mistake.

10051107...454...............4-bolt, Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"
10069282...366T......90-91...4-bolt, Mark IV, Tall deck
10069284...427T..............4-bolt, Mark IV, Tall deck
10069286...454.......90-91...4-bolt, Mark IV, Short deck
10114182...454.......91-up...4-bolt, G

i look at the blocks not numbers so i do not get it wrong the mark 5 came along in the 90s 91 to 95 and i can tell what i am looking at just the way the block as casted and rear seal so i do not carry a book if they only made that block one year ? well ok check it make damn sure it is a mark 4 block and if so then the heads can fit

Can we check by using a mark 4 head gasket compared to block and head, or is it just that close you can`t see the differance...?

Originally Posted by 406Rich

Can we check by using a mark 4 head gasket compared to block and head, or is it just that close you can`t see the differance...?

yes i can tell what i look at many way even if the heads are on but the 5and 6 bocks have a open decks all but the CNC bow tie i own all the bow ties at one time and had some mark 6 bocks as built many of the 4.5.6 block s