Xud conversion from petrol

[aggyj17]

The car did originally have an electronic speedo but when I converted it to a s16 I ran a cable through so got a choice on what way I want to run it. Engine will drop straight in on the standard mounts as it's still an xu engine and also I'm pretty sure linkages will be ok as they look the same as the xud's I've had.
What issues could I come across on the radiator?

So I only need the wiring down to the radiator then??