The 7th or 8th digit (I forget)is the engine code. You will not be able to decode drum/disc from the vin, the dealer can via the last 8 that are the actual vehicle serial number.
90_________ 8
91_________8 non intercooled_________C intercooled
92_________C intercooled
93_________C
94-97_______D
98__________D is 12v__________6 is 24v
00-02 _________6 is SO__________7 is HO
04____________6 is the 555 ______________C is the 610
07___________C is the 5.9______________A is the 6.7