Ae86 are thicker. Cant use ke70 stuff on ae86.
If you go ae86 then you have to find the rest of the stuff to go with it.
Hubs are the hardest part to source.
What are you planning to use the car for?
Could be better off getting some ajps springs and shorter inserts if your just after lows.
If your after improved performance, shockworks and ae86/xt130 or even fc rx7 if your doing track/touge work