Has Anyone Ever Tried Rear Disc Off A Grand Cherokee?

i know i saw on here somewhere about somebody who had done this before. and i have all the stuff off of a g.c. and other than the fact that i need to get real bbp axles(not the janky redrilled one that i got with my rear) with the correct offset. and other than drilling one hole in the caliper mounting bracket ,which i;ve already done. on the test fit everything looks great even the cable will work with some modification. but i noticed that the caliper bracket ,which also serves as the mounting plate against the axle tube flange that the bracket is almost twice as think as the factory drum backing plate.so my question is "will this affect the wheel bearing depth inside the axle adversly?" and btw i plan on using the timken bearing and not the greens....plus what does someone have to do to become a "mopar tech junky" instead of a "junior member"?