180sx brakes upgrade

SON240sx Automotive
1

Bought 180 front brakes. Couple of questions.

  1. Where to get the spare pads for them?
    Altima, J30, 240usdm Abs?

  2. The front-rear pressure distribution is now different, and rear brakes are too weak now. How can that be adjusted. Is the master cylinder proportioning valve adjustable, or the allen key slot there is just for disasembly? If not, then how is the adjustment done?

  3. Both caliper pistons appear to be moving, however, right wheel locks significantly faster, can that be the cylinder, or caliper, and which one?

tx

2

96-98 S14 pads work on my 180 fronts. Usdm S13 rears should work too.