use a bat or a large metal pipe and stick it between your tire and fender and roll your car back and fourth so that the bat/tube will roll betwwen the tire and fender. this should bend your fender out some and give you that needed clearence. that is the ghetto way. if u need it done right u need to get in contact with someone that has a professional fender roller.
if i was you i would get some one who has done it already................. ask them to help you or go to a drift meet and ask some one there to help you but you will need a heat gun a metal pole 3-4 inch wide to roll the fender but you might end up chiping the paint if you do it you'r self ................................good luck man it's easy you could do it i did it for my brothers ford EXploder easy stufffffff
ive rolled quit a few sets of fenders i did about 20 porsche 996 and 993 cars.. with a professional roller.. man those cars are easy ...
240's on the otherhand are a fucking bitch
my advise to you is go slow use a heat gun to heat the paint up and make it pliable and get/rent a good fender roller.. oh and dont use to much up angle on the roller wheel i hate when they flare out and up .. it looks gay and is useless