I am Trying to figure out what my 327 engine is from Here is the information I Have The Casting number on the rear driver side is 3970024. The Numbers on the front plate are T1222000 and 11B128786. From what I have gathered this is telling me it was made in Tonawanda December 22nd But from there I am Lost. If anyone can help I would really like to know what Year Make and Model Vehicle this engine came out of. Any Help would be greatly appreciated. Also new to the forum and the engine is currently in a 1983 C10 Stepside that I am fixing up.