when i started on this project i decided i would put kg discs on the front;long story short i have ended up with a '60 bug with 4 bolt wheels...yeah,i know...at the rear i have '60 axle tubes,saw short axles,backing plates and drums from later beetle,and bearing retainers to match the tubes.it doesn't look quite right,and i'm wondering if the old backing plates were the same thickness as the later ones....any guesses?thanks....mike