Ive acquired a 350 block, and its casting number is 10054727. Ive been searching to see what it came out of, and I havent had much luck. I know that it was made in canada....hence the casting "CANADA" on the block, and its a 2 bolt main, but some were built as 4's as well. 1 piece main seal. There's no heads, so I cant run numbers on those either. Pretty sure its not a GM motor, due to the lack of an engine number engraved on the deck....like GM is known for. Anybody got any ideas?