I understand that there are car and truck engine side clam shell brackets. I dont know which I have. Part number on one is 140378 then a larger 78. Other only has a 34 stamped on it. I have no idea what they are out of just kept them for years. Have searched google cant find anything. I dont want to lower the engine to find it's wrong. Can some one positively identify them. I have enough in this build would like to use them if possible.