Please Help!! Internal or external??

I'll try. There is a line running down the center of the crank lengthwise. depending on wether is was cast or forged will determine how wide that parting line is. As Chuck said, if its wide, you have a forged crank and vice versa. I think the wide one will be about half an inch or so and the narrow one about an eighth of an inch wide. I've seen them vary a little and am going on memory. Chuck?