How do I tell the difference between a 302 and a 351W 2V? I am sure the motor I have is not a cleveland but it might be a 302, who know's? The truck it is in is not the original vehicle that the engine was installed in so I can't check the VIN. The motor is a pre 1980 motor I think. If I identify the casting number where can I take that number to get info on the engine? Thanks.