I would just like to note that you shouldn't have the rear brake bias higher than your front. The reason for this is your making your brakes act like a handbrake when stopping, not good. Front brake bias should be higher like it is normally.
Test this out without ABS and you'll understand what I mean.
- 1985 Nissan Gazelle S12 (Drift Pig),
- 1987 Nissan Be-1 w/canvas roof, and a parts car