RST loom (maybe just engine loom)

depends wether u want EFI or MFI Imassuming MFI so:

Engine/Cylinder head/Inlet (MFI)
Metering unit and all hooses/injector pipes/fuel feed pipes/petrol tank/pump/rad & Fan/Intercooler/all boost/water hoses
MFI fuel ECU and Ignition ECU

sure theirs more but that'll do ya for now

looks like a nice mk4 u got their, i'd keep it looking how it is with maybe an RST bonnet unless its already got one