<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: x77-69z28</div><div class="ubbcode-body">the vin would be stamped above the oil filter. the back of the engine would have a casting number. the assembly date would be stamped on the front pad unless the block was decked. </div></div>
Not all ZL-1s had the partial VIN at the oil filter.
In those days steel main caps could not be fully processed with the block. They and the block were stamped with a sequence number to ensure they were assembled to the same block. The block was stamped center rear.
