Quote:
Originally Posted by mnm99
This is the number I was given--- 8a8W--- Does it make sense? I was told it came out of a 68 Thunderbird
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The cylinder block's engineering revision is on the outside of the engine block, behind the starter motor, and reads vertically. For a 1968 429 or 460, the block's engineer revision should be either C8VE-A or C8VE-F.
The actual casting date of the cylinder block is in the the lifter valley and is alphanumeric, such as "8B27" (which would indicate a casting date of February 27, 1968), or "8A8" (which would indicate a casting date of January 8, 1968).
The casting date in the lifter valley is really just a curiosity, and frankly 429/460 blocks regardless of engineering revision will sustain more power and abuse than most people would every consider imposing upon them.