ek3,ek4,ek9,em1 have the newer style subframe that has the steering rack enclosed inside the subframe (one peice lcas)
eg's dc's and ej's all have the older subframe where the rack is bolted to the subframe and isnt enclosed (two piece lcas)
only exception of this rule is the ej9's some prefacelifts have the one peice wishbone and older subframe and some have newer
but all facelift ej9s had the newer style subframe with the single piece lcas due to the addition of the front anti roll bar
this is all from personal experience and what i have seen through working on numerous cars and viewing others etc
hope this helps you decide whether or not the rack will fit but if you must know a friend of mine did put a dc2 rack on his ej9 only because he couldnt use an ek9 one because of the subframe differences