Toss up a picture of your supercharger. I forget which was which charger (tons of pics on the forum for us to compare) ..One of the two chargers had lines going all the way down, the other did not. That'll be an easy way for us to determine which motor you have.
Oh you're right, I didn't notice that at first because it was a birds eye view. So what are we thinking then? My rotors are definitely coated, but the SC case is a 92/93 style, right? Maybe someone swapped just the rotors from a later model m62????