Standard bore on a 454 is 4.25" where a 502 is 4.466". ..I'm betting that the "9" is a poorly cast "8" and it's the 502 , but check the bore size to confirm
engine casting number
I am trying to buy a motor and the casting numbers are 12561359, but I CAN NOT find any site that has these numbers listed. I do show casting numbers 12561357 that goes to a 454 and 12561358 and they go to a 502. Can anyone help find out what block these numbers go too.
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