Registration and Posting Agreement
casting numbers mean what it was sent out of the factory as, the stamped numbers would tell you what the engine is or was modified as
St. Catherines, OntarioJanuaryand the rest doesnt make sense. take a look herehttp://www.nastyz28.com/sbchevy/sblock.html
take some pictures please. are these the casting numbers (back drivers side of bell housing) or stamped front passengers side top of block)? the reason im asking is because it would make sense that these are the casting date numbers (Nov. 01, 1979) but then im lost on the 0560