ive done the conversion on my erst estate,i used an efi xr3i wiring loom in mine just had to chop 1 wire on the edis module,as i bought a complete xr3i it had everything i needed like the iscv and inlet manifold and a few other parts,also had to get a map sensor,act sensor and frst ecu aswell,if you use ofac management you dont have to change any wires at the ecu and the ofac map sensor just plugs straight in,if you use ofab management you have to change 2 wires at the ecu and the ofab map sensor has a different plug fitting and the wires have to be changed aswell,hope this helps