my local napa didnt have the wheel cylinder rebuild kit in my size so i just got new cylinders all together, but all they had was 7/8ths bore ('95 4wd) and my car used 3/4ths ('95 2wd). nothing weird is going to happen from increasing the bore size right? iv also seen the rear disk instal how-to and i was wondeirng how my abs can still function after i switch the back breaks.

If NAPA says they'll fit, try it. As far as ABS with the disc upgrade, the ABS uses one sensor that covers both rear wheels. The ABS will not be affected.