ZL-1 stamping numbers

[GMH454]

COPO, when Porterfield gave me the racing sheets he told me to look at the engine very carefully. When I looked in the lifter valley I was very surprised to find a set of stampimgs. Get out the flashligt and find someone with REALLY good eyesight. Mine were stamped on what look like bosses in the valley. In between watching the Olympics here I WILL dig out the remainder of the numbrers. Also check to see if your block is stamped with the 356 anywhere else other than the caps.