The wording on the listing here: http://www.hendrickperformance.com/detail-1970-chevrolet-camaro_z_28-used-16988500.html is very interesting. "Mr. MacNeish indicated in his Camaro Hi-Performance, Inc. Appraisal that the engine block is correct for the 1970 Z/28 Camaro, however, the engine pad has been machined and re-stamped with new numbers. " Really? If the numbers were machined off, than how can you tell that the block was correct for a 70 Z28? Because the stamps they chose are the correct letters? Did he verify the VIN was for a 70z? Just because it is an '010 block? Could have just as well said "engine block is correct for a 1975 C10 pickup truck".