Y-Block small-block: Produced in the US from 1954 until 1964, the Y-Block was the small block replacement for the Flathead V8 and is where this article starts. This article covers a number of Ford V8 engine families.
The fourth digit is the engineering division the part originated from, so most of the fourth digits will be “ E” for “Engine” with a few exceptions. The third digit is usually another letter, but can also be a numeral in rare cases, and it signifies the vehicle the part was designed for. The second digit will be a numeral, and will represent the year within that decade (i.e. The basic breakdown of the modern numbering convention (1959 and newer) is that the first digit is a letter and represents the decade in which the part was designed. The numbers are cast into various locations on the block itself, depending on what family of blocks you are referencing, but should be fairly recognizable and usually pretty readable. Since it’s fairly obvious that you’re looking at an engine block, the important digits are the first four and last one, two, or even three digits in some cases. Whether you’re scouring the internet or junkyard, the following Ford engine block casting numbers should help you figure out what you’re looking at.įord’s part number convention generally follows the format of a four digit casting code, followed by a four digit basic part number, which will be “6015” for an engine block, followed by the revision version. Whether it’s for a correct restoration, or a budget build, sometimes an original FoMoCo engine block is what you’re looking for.
While the aftermarket has done an exceptional job of creating performance engine blocks for Ford’s line of V8 engines, sometimes you aren’t looking for an aftermarket engine block.
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