I recently bought a LA small block off Craigslist for a cheap price. The guy said it came out of his uncle's propane powered truck and has been sitting in the garage for a decade. He said it was a 318, but I cleaned off the goop and found the casting number on the side of the block:4315830-360. The numbers on the front under the left head say 0K7360 (I think it's a 7,it's stamped very lightly). Next to that it says 0296. Underneath that is 031307. I've looked at several web sites and see the casting number, but I can't decipher the stamped numbers. Any ideas?