as ben said two choices obd1 or obd2 and 2.8 golf or 2.9 rado ..... if ur looking for just an engine and loom go for a raddo 2.9 as they are 190 bhp over the 170-80 bhp of the golf and then sorce a obd2 loom fuse board out and engine loom, ecu, throttle body, intake mani, maf, lamda sensor as the obd2 set up is better managment than obd1 that is wot i have done to mine .... that wot i would do .... or the other option is to buy a smacked obd2 golf (rear end) as ull have all u need ... hope this helps