i have a ford bus sent in from Germany, i am trying to identify the engine number so that i can register the bus, the mechanics keep giving different engine number. the first guy i called to check gave me this 974F6015AC and i called another mechanic to confirm and be double sure, he came up with this 16L99. now am confused. please any one that has a ford bus or knows about it should help me identify between the two numbers, the one that is more realistic. your suggestion would be of great help. thanks