<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: iluv69s</div><div class="ubbcode-body">It sounds like a work order number...actually could be a machine shop work order number. The first set of alum heads I had worked on the machime shop stamped 1/4" 6 digit and 1 letter numbesr in the front of each head. It was thier work order number. I almost died when I picked up the heads.
I owned a ML stamped ZL-1 block with no VIN. One of the vette motors that never got used.
I thought i hit the jackpot when I realized it had the code for the vette. Although it had no VIN, I figured it had to be one of two.
After a few days and some research I realized what I had.
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ML is a ZL-1 Camaro code.
http://www.camaros.org/copo.shtml