I am need of some wheels and I was looking at a AM sight and I noticed that they made it sound like their 5 lug conversion kits are proprietary to their company. So it has me wondering how can I tell what 5 lug conversion kit is on my 90 fox? Was it a SN swap? A cobra Swap? some other swap? I was told cobra with 12 or 13" front rotors and calipers and rear is 5 lug drum. I guess my question is how many different kits and are they all compatible? How can I tell? I did notice the front rotor is only held on by the caliper(no hub nut or bearing holding it on if this even matters).