If your going to be adding a turbocharger to the engine, you will have to change a lot of stuff. Injectors, fuel rails, spark plugs, and you will definately had to have the ECU changed to work correctly with a turbocharger. As well as this, your going to want to build up the engine. Probably forged pistons and connecting rods at least. I've never heard of anyone outside of a drag small block going for turboing, let alone with an ECU motor. Hard to say, but certainly doesn't mean it isn't worth it to you or not worth a shot. But theres deffinately a lot you'll have to do to make it an acceptable running motor that won't just blow apart the first time you really spool it up. May I ask the application for the engine? May help to some degree.