ok i know its not technically an rs turbo question but anyway here goes,

in my rs replica ive currently got a 1.6xr3 carb engine in atm, however im gonna be changing this for a 1.6 efi cvh from an xr3i what i want to know is.
will i need the wiring from the xr3i, will i kneed the full loom just an engine loom, does it just plug in or will it need changing about.

also ill have to change the side the header tank is on so im gonna need new water hoses but do i keep my current radiator in or put a new one from a 3i in.

will the drive shafts and gearbox need changing or can i just bolt the new engine onto the gearbox in there.

if anyone can help me it would be a great help or if theres any other bits that ive missed out