as your going to be driving the car with the turbo ECU, your going to need to get the doner ECU code system turned off so your can use your existing lock set
rear end shunt coupes are not easy to come by. your going about it the best way as you need a lot of the coupe to make it work
its hard work, full of pain, and unless you have run a 20vt coupe in the past i would honestly think twice about it
its a drop in conversion as regards mounting points. the wiring is not plug and play however. the loom match up is close but you got to have your wiring hat on
make sure you do this on the 147 bravo and not the 155, it can be done on the 155 but its a massive pain in the ass