I am trying to figure out if the motor in a 87 crown vic im working on has been swapped out, it is a non roller, and doesnt even have the provisons for the spyder, I got one of the heads off and it has a D8OE casting number on it, does anyone know what casting number the head should have came with? I have another 87 crown that hasnt been torn into so its possible it may be a roller motor!