i have a 96 lumina and i want to put on a 17" rim off of an uplander. i had to get a 5mm spacer for the front wheels to clear the brakes. problem is that the backspacing for the uplander wheel is different and i have to add a 5mm spacer, so i don't know what size of a new stud i need to get. Do i need to get new ones for the back to? I've asked so many people and have not got any answer. If anyone can help it would be great!