Year!

Huh, I don't know if they have a VIN stamped in them like auto engines, but about the only thing that really matters is whether it is an 88-02 or 03+. The 88-02s had a four wire stator while the 03+ have a five wire stator.
 
There are numbers stamped on on side of the cases ex:3MJXX-XXXX-XXXXX. I have to try and find the info that tells ya what year range that is Damn can't remember where i seen it.
 
AHH I seen them in the blaster parts manual CD I have It goes from 91-06 only so tell me what the first 4 number letter config is on the case half flywheel side