Hi guys, hoping someone can set me straight about the block I have. I have a bare block that has casting number 3970010, it is a 4 bolt main block with the main caps stamped 2842, it also has 010 buy the oil filter housing which means 10 percent more iron or nickel which should mean a better block. However these blocks were 302 in 69 and 327's and 350's in other years. The block casting date looks like G177 on the passenger side tip of the block. So am i right that that would mean it was produced on (G) July 17 1977 or would it be 1967 ?? I don't think these blocks were produced in 67 so that makes me think it must be 77. Any help would be much appreciated.