i have 16x7's all around and with a 3inch narrowed beam , drilled drums and i turned the camber nut to give me full neg camber i still had to roll the fenders. as for the rear the neg camber was just enuff to tuck them but thats again with the rolled finders and drilled drums.
i should have done the 4incher , but back when i had it done it was almost unheard of with the 3inch.