try www.club-k.co.nz forums.. theres heaps of info on there about changing them over..
PRESENT: KE35 Sr coupe (4agte project), GTS-T, MX40 Cressida coupe
EX:KE25 SL Coupe, KE30 4 door, KP61 4 door hatch, KE36 2 Door Wagon, AE70 2 Door Sedan, AE101 FXGT
if you want to put bigger brakes and 4x4.5 stud pattern,i used ke70 then ae85, just by swapping the swing arms (so you get the bigger balljoint) bolt on the new strut and steering arm and change the top platform to ke2#, you also get wider track.