where would i find the casting number. IS there any distinct markings to look for? It has the 4 prong square plug but it was not connected!! The tranny is in a 78 camaro but comes form a 82 caprice. I have the numbers from anyside if anyone can use them for help just let me know. I am trying to tell if it is a th350 or not. It also has 13 bolst and the pan is a square with one corner missing.