break balance, ke30 upgrade

[79rolla]

im in the process of putting on some significantly larger breaks on the front of my ke30.
they are 4pot calipers, braught them as oversized ae86 breaks, disks are vented.

im guessing this is going to significantly upset the breaking balance.. so what upgrade is worth dong on the reaier? better break shoes wouldint make enough of a diferance would they? or will it not mater to much?

[79rolla]

i do have an older box sss bluedird in the padoc that i could stail the reair breaks off of and botch up to fit? it is fwd but has the same stud pattern (4x114) or shuld i look for old supra or hilux breaks?