ZL-1 stamping numbers

[GMH454]

Thanks guys, does that mean all ZL-1s icluding the Camaros had matching block # stamped in the block and caps ? Also does anyone really know what the 107 means. Was it the 107th engine assembled ? Now that I think of it were the crate engines completed and put away or were they completed at time of sale, say 1971 or 1972. I wish I knew. Guy I bought my engine of after I bought it told me he bought it from Greenwoods workshop in Florida in about 1976. Has a burned TRW 2300
piston still in it.