almost completed a mk1 20v turbo , i brought the mounts off ebay for the gearbox, and made teh drivers side engine mount , brought the conversion shafts 100mm off ebay , but you need to make sure the mk4 has the 100mm gearbox flanges for them to work , i used the standard ecu and loom , then figures out how to wire it up by using jsut that loom , but then you need the ecu decoding , i can help you with the wiring its pretty simple