Anybody running 17" Cobra Bullit rims on a Duster

for those of you that used wheel spacers, did you change the wheel studs? i have factory disc rotors, and i need to get longer wheel studs for them so i can use my 3/8 spacer i got...i cant find the exact length i need, they have ones that are like 3" long..would it be ok to get longer ones, and just cut some material off them?