On this episode of The Skid Factory we set about modernising an iconic 1980's HDT VL Calais by adding a modern engine management system. We explain in depth what's required to successfully convert a carburettored engine to modern engine management from fuel system to ignition right down to wiring needs and initial startup. The ancient Quadrajet Carburettor is being replaced by multi-port fuel injection and an electronic throttle body from an LSA. The distributor is also swapped out for a VT Commodore crank angle sensor so the Haltech Elite 2500 ECU can have full control over the engine.