wheel spacing

[widearches]

hey, I have a ford fiesta mk6 in which I have put the wjrc rally body kit on. I've currently spaced the wheels out, but its not enough I need to go more. it already shakes loads as I've got 30mm spacers already. dose any one know anything that could help? or that has done this build before? im thinking a for focus mk2 axel conversion? Any help is much needed