I know where I can get a set of cragar steel wheels for dirt cheap. They are 15x8 with 4" backspacing. I want to put 30x9.5 tires on these rims. will this combo work on my 92 xj with no lift? would the 8" inch rims be ok for these tires? this xj does not or will ever get wheeled hard.just the occasional muddy trail and snow. thanks,Ben