I was looking at the GCR today and I was looking at my Series and the ITB B section Mustang 2.3 years run from 79-93 so I could use parts from these cars. example: Use the rotors off a 1989 Mustang 2.3 ,I have 1980 rotors and it is hard to get racing pads for it anymore I was lucky when I bought the car there was a couple of sets with it, anyway if i don't gain any performance advantage can I use the rotors off a 89 if they are the same size and configuration. What about the spindles I know this has probably been addressed but it is all kinda gray area to me. I read about people switching out a front clip on a GTI from a completely different year, would this be a performance inprovement, better aero's etc. I am not picking on you VW guys it was the first car to come to mind. I know but I have heard several stories about what I can and can't do. I know if the GCR says you can't don't, but if it doesn't say still don't. Any thoughts