i know this has probably been convered many many times but i just wanna be shore in whats involved.bought a s2 rst and little did i know , went for mot and rotten.too much money to fix.so....i know some selling a mint white xr3i with a efi engine.car is very cheap and has very good shell.wanna convert it and put the bodykit and engine in it.bodykit, no problems....engine...wot is involved?use rs bottom end with efi head?is the wiring gunna be tricky?any help will be much apriciated.