if u have an efi 4age in yr car at moment then its pretty easy
only prob u get is if u get the 4agze with the lsd gbox, it has bigger shafts so u have to change the struts/hubs aswell, for some reason i had to made custom or modify the fron tn rear engine mounts
the 4agze needs a scope in the bonnet for it to shut or
u could mount a front mount bit thats abit of a shit fight,
u can get an exhuast place to make pipes if u go that way
i can do the wiring on both these engines for a price
they will look just like standard wiring