When obtaining a motor is the only other item I need a ECU? Are the ones Mace offer suitable?

You can use your current ecotec wiring loom (though requiring slight modification), and a revised memcal (VS-VT models) or a revised PCM (VX-VY models) to suit. In regards to a suitable memcal or PCM, we can supply these to suit. Please note you could run an L67 wiring loom and computer, however, this would considerably add to the amount of work associated with the conversion.