I would definately say you need the ST170 Engine ECU, engine loom and Car loom,clocks, fuel tank, pump, lines etc. Are you using a 1.6 fuel pump? The ST170 engine regulates the fuel pressure via the pump which is controled by the Blackoak ECU.
Best thing you could have done is buy a written off ST170 and swap the parts over, its cheaper than sourcing all the bits your now missing.